Church Fathers on John 15:27

The disciples might say, If they have heard words from Thee, such as none other has spoken, if they have seen works of Him, such as none other has done, and yet have not been convinced, but have hated your Father, and you with Him, why do you send us to preach? How shall we be believed? Such thoughts as these He now answers: But when the Comforter is come, Whom I will send to you from the Father, even the Spirit of Truth which proceeds from the Father, he shall testify of Me.

As if He said, Seeing Me, they hated and killed Me; but the Comforter shall give such testimony concerning Me as shall make them believe, though they see Me not. And because He shall testify, you shall testify also: And you also shall bear witness; He will inspire your hearts, and you shall proclaim with your voices. And you will preach what you know, Because you have been with Me from the beginning; which now you do not do, because you have not yet the fullness of the…

Whom I will send to you, thus declaring the equality of the Father and the Son. That He might not be thought however to be opposed to the Father, and to be another and rival source, as it were, of the Spirit, He adds, From the Father, i.e., the Father agreeing, and taking an equal part in sending Him. When it is said that He proceeds, do not understand His procession to be an external mission, such as is given to ministering spirits, but a certain peculiar, and distinct…