Augustine of Hippo
Catena Aurea · Johannesevangelium 5
Then answered Jesus and said unto them, Verily, verily, I say unto you, The Son can do nothing of himself, but what he seeth the Father do: for what things soever he doeth, these also doeth the Son likewise. For the Father loveth the Son, and sheweth him all things that himself doeth: and he will shew him greater works than these, that ye may marvel.
(contra Serm. Arianorum, c. 9. [xiv.]) This is not a sign of failing in Him, but of His abiding in His birth from the Father. And it is as high an attribute of the Almighty that He does not change, as it is that He does not die. The Son could do what He had not seen the Father doing, if He could do what the Father does not do through Him; i. e. if He could sin: a supposition inconsistent with the immutably good nature which was begotten from the Father. That He cannot do; this then is to be understood of Him, not in the sense of deficiency, but of power.