Do angels have free will?

Angels are spiritual beings and have authority and free will; whether to stay as they are and grow in goodness and virtue, or to become evil.⁶⁵² According to St. Basil the Great , it is possible for the angels to deviate towards evil because the heavenly hosts are not holy by nature. Holiness is outside their nature which they can acquire by their hard work and watchfulness. Their perfection is a result of the work of the Holy Spirit within them and their correct usage of their free will.

652 See St. John of Damascus, An Exact Exposition of the Orthodox Faith 2.3 (NPNF II/9:B19; PG 94:868).