Sometimes when there is a crescent moon shortly after sunset you can see the bright crescent of the moon but you can also see the rest of the moon as a dark disc . . . George, that pale glow on the unlit part of a crescent moon is light reflected from Earth.
Bright moonlight can illuminate an earthly landscape on nights when the moon is full.
There's a crescent moon in the west in the next few evenings. When you see it, think about the fact that the sun is just below your western horizon. By the way this pale glow on the moon has a name. With thanks to the National Science Foundation, we're Block and Byrd for Earth and Sky.