John 8:14
Jesus answered and said unto them, Though I bear witness of myself, my testimony is true: for I know whence I came, and whither I am going; but ye know not whence I come, nor whither I go.
John 1:17
For the law was given by Moses, but grace and truth came by Jesus Christ:
John 8:45-46
And because I say the truth, ye believe me not. Which of you convicteth me of sin?
John 14:6
Jesus saith unto him, I am the way, and the truth, and the life: no man cometh unto the Father but by me.
John 17:17
Sanctify them by thy truth: thy word is truth.
John 18:37
Pilate therefore said unto Him, Art thou then a king? Jesus answered, Thou sayest right, I am a king. For this end was I born, and for this came I into the world, even that I might bear witness to the truth. Every one that is of the truth, heareth my voice.
Revelation 3:14
And to the angel of the church of the Laodiceans write, These things saith the Amen, the faithful and true witness, the beginning of the creation of God; I know thy works, that thou art neither cold nor hot: