It may not be a quote, but it is a great directive from Be Amazing. So go about your day keeping this first in mind.
Before every word you speak and action you take, think to yourself, “Is this nice? Is it necessary? Is it kind?”
Being a nice person doesn’t mean you’re a pushover. Being a nice person doesn’t mean you don’t stand up for yourself and be assertive. It just asks you to think twice before you do.
We sometimes learn that not everything we think needs to be spoken and not everything that is understood needs to be said. Pick and choose your battles wisely. Your victory will be a more simple, peaceful and tranquil existence.