Some things in life are zero-sum. If you give them away, you end up with less.
Some things are a bit better. You can give them away, and end up pretty not far from where you started. Not better off, but certainly not much worse off.
Some things, however, are not only impossible to lose, but continue to keep coming back to you thicker and faster the more you give them away.
Kindness. Laughter. Music. Passion. Joy. Beauty. Truth. (I’m sure you can think of many more to add to the list.)
If you want these things in abundance, you must first learn to give them away liberally. If you are stingy with them, you only discourage them from visiting you. But if you are generous with them, you welcome them in.