Haymo of Halberstadt

„(Hom. in Oct. Pent.) Or, Thou canst not tell whence it cometh; i. e. thou knowest not how He brings believers to the faith; or whither it goeth, i. e. how He directs the faithful to their hope. And so is every one that is born of the Spirit; as if He said, The Holy Spirit is an invisible Spirit; and in like manner, every one who is born of the Spirit is born invisibly.

„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?

„(Hom. in Oct. Pent.) Why, it is asked, does He speak in the plural number, We speak that we do know? Because the speaker being the Only-Begotten Son of God, He would shew that the Father was in the Son, and the Son in the Father, and the Holy Ghost from both, proceeding indivisibly.

„Otherwise; By the mount on which the Lord sate is figured the Heaven, as it is written, Heaven is my throne. (Is. 66:1.) But when the Lord sits on the mount, only the disciples come to Him; because before He took on Him the frailty of our human nature, God was known only in Judæa; (Ps. 76:1.) but when He came down from the height of his Divinity, and took upon Him the frailty of our human nature, a great multitude of the nations followed Him. Herein it is shewn to them that teach that their speech should be so regulated, that as they see each man is able to receive, they should so speak the word of God. For the doctors ascend the mountain, when they shew the more excellent precepts to the perfect; they come down from the mount, in shewing the lesser precepts to the weak.