The mind grows by taking in, but the heart grows by giving out.
From 2 Corinthians 9:6-7: “The point is this: the one who sows sparingly will also reap sparingly, and the one who sows bountifully will also reap bountifully. 7 Each of you must give as you have made up your mind, not reluctantly or under compulsion, for God loves a cheerful giver.”