Angel

derived from the Greek "angelos", meaning messenger.
Messenger of God.
They come, and visit,
Visit and come
sending messages, only doing their assignment, 

saying what we couldn't hear, doing what we couldn't do, doing what we need but not what we want, unless our wants has eventually become pure enough to turn into needs
Angel,

pure, holy and determined
focused, loyal and unwavering
They are necessary
The visits are necessary,
meaningful, successful 

We make it easier for them to do their job with no delays when we welcome them wholeheartedly & receive with faith
We make it easier for them when we can see who they are, whose they are and not who we want them to be.