Augustine of Hippo
Catena Aurea · Johannesevangelium 1
Jesus saw Nathanael coming to him, and saith of him, Behold an Israelite indeed, in whom is no guile! Nathanael saith unto him, Whence knowest thou me? Jesus answered and said unto him, Before that Philip called thee, when thou wast under the fig tree, I saw thee. Nathanael answered and saith unto him, Rabbi, thou art the Son of God; thou art the King of Israel. Jesus answered and said unto him, Because I said unto thee, I saw thee under the fig tree, believest thou? thou shalt see greater things than these. And he saith unto him, Verily, verily, I say unto you, Hereafter ye shall see heaven open, and the angels of God ascending and descending upon the Son of man.
(Tr. vii. c. 19) What meaneth this, In whom is no guile? Had he no sin? Was no physician necessary for him? Far from it. No one was ever born, of a temper not to need the Physician. It is guile, when we say one thing, and think another. How then was there no guile in him? Because, if he was a sinner, he confessed his sin; whereas if a man, being a sinner, pretends to be righteous, there is guile in his mouth. Our Lord then commended the confession of sin in Nathanael; He did not pronounce him not a sinner.