19/04/2026
Eternal Life John 17:3
Rev. Dr. Peter Xu 2026-4-19
Good morning, everyone. Today, through John 17:3, we would like to think about the question, “What is eternal life?” When we hear the phrase “eternal life,” many people may first think of “life after death.” Certainly, that is included. However, the eternal life spoken of in the Bible is not limited to that. Eternal life is not simply life that continues forever in terms of time. Rather, it is to know the true God and Jesus Christ whom He has sent. In other words, eternal life is to enter into a living relationship with God. It is a life of knowing the Lord, being known by the Lord, and walking with Him. It is not something that begins only after death; it is a life that already begins here and now on earth. Every day, we live seeking many things. We seek security. We seek success. We seek health. We long to be recognized by others. We desire a stable life. None of these things are wrong in themselves. Yet no matter how much we gain, there remains something in the depths of our hearts that is not fully satisfied. Why? Because human beings were originally created to truly live only in fellowship with God. If we do not know God and remain separated from Him, then no matter how much we possess, a certain emptiness still remains within us. On the other hand, even in weakness, in tears, and in the midst of hardship, those who know the Lord possess a peace that this world cannot give. That is a sign of eternal life.
What Is Eternal Life?
Then what is eternal life? John 17:3 speaks of it very clearly: “And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent.”
The word “know” here does not mean simply understanding something as information. It is not merely knowing in one’s head that “there seems to be a God.” In the Bible, to “know” means to meet personally and to have a relationship. It means to love, to trust, to obey, and to walk together.
For example, we may know the name of a famous person. Yet that does not mean we truly know that person. By contrast, with family members or friends, we do not merely know their names; we know, to some extent, their joys and sorrows, their weaknesses and desires. There is a relationship there.
In the same way, to “know God” in the biblical sense is to live in such a relationship. Eternal life means knowing God and Christ. It means being restored from separation from God. We, who were far away because of sin, are brought back to God through Jesus Christ and enabled to live as children of God. Therefore, eternal life is not merely a guarantee for the future; it is also a new way of living that begins here and now.
The Frailty of Life in This World
And yet, in our daily lives, we may not think very seriously about “life.” Each day seems as though it will simply continue. Tomorrow feels as though it will naturally come. We assume that the life we have now will go on as it is. But in reality, our lives, and everything in this world, are never everlasting. At times, a single event can change a person’s life dramatically. Health may be lost. There may be separation from someone dear to us. Things we have built up may collapse. The ordinary life we thought was stable may be shaken in an instant.
When I think about this, I am reminded of certain events in history—major accidents, natural disasters, unexpected tragedies. No matter how advanced human civilization and technology become, we are still forced to realize that we are finite beings. Some of you may feel that your life is stable right now. Some may be enjoying life and living without much difficulty. But there is no guarantee that such things will last forever. One day, what we once took for granted may suddenly be taken away. We live in such an uncertain world. That is why the Bible asks us: “What is it that never changes?” “What is it that is truly worthy of our trust?” Do we possess true life that can never be taken away? Do we have a hope that cannot be lost? Do we stand upon a foundation that will not be shaken even in the midst of storms?
What the Story of the Titanic Asks Us
When thinking of these things, I am reminded of the Titanic. When people hear “Titanic,” many think of the movie. The film starring Leonardo DiCaprio became famous throughout the world as a grand love story. Yet the actual sinking of the Titanic behind that story poses a very weighty question to us. The Titanic was a luxury liner that was even called “unsinkable.” People boasted in its greatness and technology, seeing it almost as a symbol of human power. Yet that ship struck an iceberg and sank into the depths of the sea. This event symbolically shows us that what human beings glory in is never absolute.
A few years ago, there was also the grounding accident of the Italian cruise ship Costa Concordia. The accident itself was shocking, but what particularly caught people’s attention was the reported conduct of the captain afterward. A person who should have remained to the end in order to ensure the safety of the passengers was said to have boarded a lifeboat before anyone else. It was even reported that he claimed, “I accidentally fell into the lifeboat.” That image left many people deeply disappointed. By contrast, the captain of the Titanic is said to have remained to direct rescue efforts until the very end and to have shared the ship’s fate. Of course, no human being is perfect. Yet in extreme situations, what a person values most may be revealed. And on the Titanic, there was another man whom we must not forget: John Harper, a Scottish pastor.
The Testimony of John Harper
John Harper believed in Jesus Christ at the age of thirteen and began preaching at seventeen. His ministry was blessed, and he proclaimed the gospel to many people. The church grew, and as an evangelist he was used in many places to encourage and guide others. In 1912, he was invited as a guest speaker to a church in Chicago and boarded the Titanic with his six-year-old daughter. But as you know, the Titanic struck an iceberg and began to sink. At that moment, John Harper first made his way toward a lifeboat. Yet he did not try to save only himself. First, he placed his beloved six-year-old daughter into the lifeboat and said, “I’ll see you again someday,” as he sent her away. Then he left. It is said that he ran about on the ship crying out, “Women, children, and those not yet saved, get into the lifeboats quickly!” He even gave his own life jacket to someone who did not have one. Soon the ship sank, and many who could not get into lifeboats were thrown into the icy sea. Even in that extreme situation, he continued to proclaim the gospel. To one man who was desperately trying to stay afloat, Harper asked, “Are you saved?” The man answered, “No.” Harper then said, “Believe in the Lord Jesus, and you will be saved—you and your household.” After that, the waves carried him away. But strangely, it is said that the waves brought him back near that same man once more. Again he asked, “Are you saved now?” The man still answered, “No, I do not think I can say that I am.” Then Harper repeated the same words: “Believe in the Lord Jesus, and you will be saved—you and your household.” After speaking those words, John Harper sank beneath the sea. He died at the young age of thirty-nine. It is said that out of 2,201 people on the Titanic, 1,522 lost their lives. John Harper was one of them. But the story did not end there.
Four years after the disaster, a gathering of Titanic survivors was held in Canada. At that meeting, a young man stood up in tears and testified: “I am a survivor of the Titanic. That night, while I was floating in the sea, John Harper came to me and asked, ‘Are you saved?’ I answered, ‘No, I am not saved.’ Then he said, ‘Believe in the Lord Jesus, and you will be saved—you and your household.’ After that, he was carried away by the waves. But then he came back to me again and asked, ‘Are you saved now?’ I still answered, ‘No.’ So he spoke the same words once more, and then he sank into the sea. That night, in the middle of the ocean, I believed in Jesus Christ. I am the last person whom John Harper led to salvation.”
This testimony moves our hearts, because it shows what John Harper held onto until the very end. It was not the preservation of his own life. It was not the wealth, honor, or security of this world. What he held onto until the last moment was the salvation found in Jesus Christ. He knew what eternal life was. And even in the very moment when he faced death, he longed for others to receive that life as well.
What Truly Never Changes?
As we hear this testimony, we cannot help but ask ourselves: What am I holding onto as I live? Do I possess something that I can carry with me even to the end of life? Do I have a hope that cannot be taken away? The things of this world change. Health changes. Status changes. People’s opinions change. The times change. What seemed certain yesterday may no longer be dependable today. Yet the Bible says in Hebrews 13:8: “Jesus Christ is the same yesterday and today and forever.” What a powerful Word this is.
Even if everything in this world changes, Jesus Christ does not change. Even if the times change, even if circumstances change, even if human hearts waver, the Lord does not change. Here lies the foundation of our faith. A great ship like the Titanic can sink. Our lives, too, can be violently shaken by unexpected events. Just as with the Great East Japan Earthquake, the world can suddenly be transformed in a single day. What existed yesterday may be gone. The ordinary life we assumed would continue may disappear. Such things can truly happen. And yet, even in such circumstances, Jesus Christ does not change. He is the same yesterday, today, and forever. That is why we can place our trust in Him.
The Life of One Who Has Eternal Life
To have eternal life does not mean only that we will go to heaven someday in the future. It also concerns how we live now. As with John Harper, those who know eternal life can still place their hope in the Lord even in the face of death. This is because they know that their life is in the Lord’s hands. Of course, we may not be placed in such a dramatic situation as John Harper was. Yet in our daily lives, we are constantly being asked: What do we place first in our lives? What do we rely on for peace of mind? If we were to lose something, what would make us feel that we had lost everything? The answer to these questions reflects the state of our faith. Those who possess eternal life do not despise the things of this world. Rather, while cherishing each day in this world as a gift from God, they do not allow themselves to be ruled by those things. They do not cling to what can be lost; instead, they live trusting in the One who can never be lost.
The Lord Is Still Knocking at the Door of the Heart
Even now, Jesus Christ is knocking at the door of people’s hearts. He is saying, “Believe in Me.” “Come to Me.” “I want to give you eternal life.” The words John Harper spoke until just before he sank into the sea—“Believe in the Lord Jesus, and you will be saved—you and your household”—were not merely the expression of his own zeal. They were the gospel itself. They were the invitation that the Lord extends to all people. How will we respond to this invitation? Will we say, “I will think about it someday”? Will we say, “I do not need it yet”? But life does not unfold according to our plans. That is why it is so important to listen to the Lord’s voice now, at this very moment. Eternal life is to know the only true God and Jesus Christ whom He has sent. This life is given to those who believe in the Lord. And this life cannot be lost, no matter how fierce the storm.
My friends, do we possess true life? Do we possess eternal life? Have we entrusted our lives to the One who never changes? The Titanic sank. All the things of this world will one day pass away. But Jesus Christ will never change. He is the same yesterday, today, and forever. And to know Him is eternal life. May we not rely only on the temporary things of this world, but become people who trust in the unchanging Lord Jesus Christ. May we become those who live by the life of knowing the Lord—the life of eternity.