John 8:12-14
When Jesus spoke again to the people, he said, “I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life.” The Pharisees challenged him, “Here you are, appearing as your own witness; your testimony is not valid.” Jesus answered, “Even if I testify on my own behalf, my testimony is valid, for I know where I came from and where I am going. But you have no idea where I come from or where I am going.
John 8:12-14