Our Lord however overthrew their argument: Jesus answered and said, Though I bear record of Myself, yet My record is true. This is an accommodation to those who thought Him no more than a mere man. He adds the reason, For I know whence I come, and whither I go; i. e. I am God, from God, and the Son of God: though this He does not say expressly, from His habit of mingling lofty and lowly words together. Now God is surely a competent witness to Himself.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. lii. 2