Answer:
I am constantly overlooked by everyone but everyone has me.
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
I carry you down a gentle stream.
I am a pretty one, fluttering in the pale blue sky. Delicate, fragile on the wing, indeed I am a pretty thing. What am I?
When you take away the whole from me, there is always some left. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.