[3.] And what is this that He saith, “We speak that We do know, and testify that We have seen”? Because with us the sight is the most trustworthy of the senses, and if we desire to gain a person’s belief, we speak thus, that we saw it with our eyes, not that we know it by hearsay; Christ therefore speaks to him rather after the manner of men, gaining belief for His words by this means also. And that this is so, and that He desires to establish nothing else, and refers not to sensual vision, is clear from this; after saying, “That which is born of the flesh is flesh; and that which is born of the Spirit is spirit,” He adds, “We speak that we do know, and testify that we have seen.” Now this (of the Spirit) was not yet born ; how then saith He, “what we have seen”? Is it not plain that He speaks of a knowledge not otherwise than exact?