Genesis 28:12 - "And he had a dream, and behold, a ladder was set on the earth with its top reaching to heaven; and behold, the angels of God were ascending and descending on it."

The word translated "angel" in the text is the Hebrew word "Mal'ak" (mal-awk'), which means to despatch as a deputy; a messenger; specifically, of God, ie. an angel (also a prophet, priest or teacher).
The point is the messengers that are to ascend and descend upon this ladder are not just angelic beings, but God's messengers, which WE ARE CALLED TO BE.

ALBERT FINCH MINISTRY
http://afministry.ning.com/