It's a universal law: You have to give before you get. You must plant your seeds before you reap the harvest. The law works to give you back more than you have sown.
When you give to others, you'll find yourself blessed. The more you sow, the more you reap.
He who obtains has little. He who scatters has much.
Nature does not give to those who will not spend. You only get to keep what you give away.