Learn about The holy angels :
THE meaning of the word Angel is messenger. That name is given to those pure spirits because such is the relation they bear to God and us. Their principal duty, however, is the same as the office of the blessed in heaven to see, love, bless, and enjoy God for ever and ever. Among the ancients there were many who believed there was nothing in the world but what could be seen or perceived by the senses. The Sadducees, for instance, did not believe in the existence of spirits.
It is the boast of modern atheists and rationalists that there is nothing but & “Nature” and “the forces of Nature”; with them there are no angels.
Some of the Greek philosophers held that there were angels, but that these angels had bodies ; not, indeed, corporeal, dense bodies like ours, but bodies suitable to their nature thin, airy, star-like bodies. Some, even, of the Fathers, on account of the angels being represented as having the appearance of men, seemed to favour the theory of their having bodies. Petavius says that Irenajus, Tertullian, Origen, and others held this doctrine.