You can water your plants. You can walk your dog everyday. You can feed the birds in the park. But the day that you forget to sustain your plants, or are too busy to cater to your dogs need for the outdoor experience, or run out of bird food for the park, things tend to fall out of balance. Plants survive, so do the dogs and the birds. They start to believe in an entitlement to your generous acts. Something I've learned is that it's not always your job to take care of someone else. There's always rainstorms, back doors, and picnic crumbs waiting for their turn to take care of someone.
I used to feel pressure for having to be the source of someone's happiness.