This is a remarkable statement from Jesus. It is a claim that He makes that matters most to any person in the world. It states that a relationship with Him (obeying His word) is really belief in God the Father and leads to a new life and a new eternal destiny. He claims to be the only true path to spiritual peace (see also John 14:6), and this is very significant.
Jesus had just performed a miracle that had all of the Jewish authorities upset. He healed a paralyzed man on the Sabbath and made a claim to use God’s power, asserting God’s preferences in the use of it (John 5:21). This was a clear demonstration of deity. He had physically renewed and enlivened this man on a day of rest and worship. And only God could do what they had just seen done, The scribes and Pharisees knew this. But they refused both to hear Jesus on the matter and to believe what they had just witnessed.
Jesus is the source of my life and my destiny is to always live with Him. It is a natural part of my life right now and is what eternity will be. The power of Christ that turned cripples into dancers, made the blind see the artistry of God’s world, brought music to deaf ears, and confronted the hard hearts of the religiously indifferent is at work in my heart and life forever! That is a pretty amazing experience… right now and forever.