Who knows who?

Who Knows Who? :
There are parts of the puzzle that remain unseen.
There are parts of the picture that could never be.
There are good friends watching silently.
There are those that you are yet to meet.

Who knows who might be watching out for you?

All those good friends that you're yet to meet?
They will alter you substantially,
Bringing lines and loves that trouble thee,
But you'll find ones that sit comfortably.
So all those whispers known only to the trees
And all those unknown feelings yet to be,
They'll come from angels and omens and food, for free.
You'll find the one to fit this one to a T.

Who knows who might be watching out for you?