He says this to explain to us the cause of the revelation made to the world, and of His taking upon Him the human nature. For as the Son, though He is the giver of the Spirit, does not refuse to confess as man that by the Spirit He casts out devils, so, inasmuch as He was made man, He does not refuse to say, The Spirit of the Lord is upon me.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Orat. 2. cont. Arian.