John 12:25

John 12:25. He that loveth his life shall lose it; and he that hateth his life in this world shall keep it unto life eternal.

To hoard your energies will be really to destroy them, like hoarded wheat which in the end becomes useless; but to give up your energies, to expend your life-forces, this is to sow the wheat, and this is the way to ensure the harvest.