If I have told you earthly things,.... Not that the doctrines he delivered were earthly ones; for he was not of the earth, but from heaven, and above all, and so spake not of the earth, but of heaven, Joh 3:31; and this doctrine of regeneration was an heavenly doctrine; and the thing itself required supernatural power, and grace from above: but either they were the more easy doctrines of the Gospel; or were delivered in a plain and easy style, and illustrated by similes taken from earthly things, as from human birth, from the water, and from the wind:and ye believe not; i.
e. those things; ye do not receive them, nor give credit to them; or "me", as the Ethiopic Version adds, who relate them on the best evidence, having fully known, and clearly seen them:how shall ye believe; give credit to me, or receive my testimony:if I tell you of heavenly things?