Church Fathers on Luke 10:19

It was said above that our Lord sent forth His disciples sealed with the grace of the Holy Spirit, and that being made ministers of preaching, they received power over the unclean spirits. But now when they returned, they confess the power of Him who honored them, as it is said, And the seventy returned again with joy, saying, Lord, even the devils are subject to us, &c. They seemed indeed to rejoice rather that they were made workers of miracles, than that they had become…

Now our Lord, in a remarkable manner, in order to put down high thoughts in the hearts of His disciples, Himself related the account of the fall which the teacher of pride suffered; that they might learn by the example of the author of pride, what they would have to dread from the sin of pride. Hence it follows, I beheld Satan as lightning fall from heaven.

He is called Satan, because he is an enemy to God, (for this the Hebrew word signifies,) but he is called the Devil, because he assists us in doing evil, and is an accuser. His nature is incorporeal, his abode in the air.