God works in you, both the willing and the doing. That means: The impulse toward good and the power to carry it out both come from him. You are not left on your own.
When you feel a good desire inside you pulling you toward love, truth, or generosity, that's no accident. That is God working in you. And he gives you not just the desire but also the ability to follow it.
Today you can follow the good impulse and know: God is the one moving both in you.