Answer:
The more you take away, the bigger it gets.
What is between heaven and earth?
A red house is made out of red bricks. A blue house is made out of blue bricks. What is a green house made out of?
What object has keys that open no locks, space but no room, and you can enter but not go in?
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?