John 8:12-14

12Again therefore Jesus spoke to them, saying, I am the light of the world; he that follows me shall not walk in darkness, but shall have the light of life.

13The Pharisees therefore said to him, Thou bearest witness concerning thyself; thy witness is not true.

14Jesus answered and said to them, Even if I bear witness concerning myself, my witness is true, because I know whence I came and whither I go: but ye know not whence I come and whither I go.