Written by Stefan Sencerz, Contributing Writer, Classical Wisdom
There are, of course, some dissimilarities between devas and angels. For one thing, angels are not born and seem to be everlasting. Devas are born (or reborn) (Rg Veda i.143.2 and x.129.6) and do not remain in their heavens eternally. Although their life-spans are very long, eventually they exhaust their karma and are reborn in a different realm.
There are, however, some interesting similarities between them. Both devas and angels are purely spiritual (i.e., immaterial) beings. Devas seem to lack perfect knowledge or wisdom and generally do not interact with devas occupying plans of existence higher than their own.
They can also lack spiritual wisdom. For example, according to Kaushitaki Upanishad (Book 4), Indra was weaker than his adversaries, Asuras, before he come to know his own Atman (soul), suggesting a kind of spiritual awakening.
Perhaps most interestingly, both angels and devas display moral flaws. Some angels are excessively proud or jealous of humans. This leads to their rebellion against God and eventual fall. Similarly, many devas are too preoccupied with pleasures, failing to give proper respect to Buddha and his fully awakened disciples, who represent the perfect wisdom. Thus, they show a similar lack of humility.