He promised eternal life tve. He exposed our errors. He revealed God the Father to us. He promised eternal life to his followers. He explained the work He had come to do.
Human strength can do nothing.
The words that I have spoken to you are from that life-giving Spirit. The sky and the earth won't last forever, but my words will. Believing in Christ is more than believing that He was a good man who spoke profound truths. It means to acknowledge that He came to do something no one else could do. He suffered and died as the sinless Son of God to pay the penalty of our sins.