Gregory of Nazianzus, on 1Sam 16:6

“And when they were come in, he saw Eliab, and said: Is the Lord’s anointed before him?”

“Do not say, "I do not mind a mere priest, if he is a celibate, and a religious [person], and of angelic life; for it would be a sad thing for me to be defiled even in the moment of my cleansing." Do not ask for credentials of the preacher or the baptizer. For another is his judge and the examiner of what you can't see. For humans look on the outward appearance, but the Lord looks on the heart.”

Imported from an open dataset — not yet checked against the printed edition.