Haymo of Halberstadt
Catena Aurea · Johannesevangelium 3
Nicodemus answered and said unto him, How can these things be? Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things? Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness. If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things.
Nicodemus cannot take in the mysteries of the Divine Majesty, which our Lord reveals, and therefore asks how it is, not denying the fact, not meaning any censure, but wishing to be informed: Nicodemus answered and said unto Him, How can these things be?