Angels are forms, images and expressions through which the essences and energy forces of God can be transmitted; and, since there are an infinite number of these forms, the greatest service anyone can pay the angelic host is never consciously to limit the ways angels might appear to us.
When you experience both Silence and the Word deeply, you see that the Word comes from the Silence and the Silence is in the Word. When you really listen to God speaking to you in each moment, you see that what speaks to you is the Silence.