Complaining is non-acceptance

Here's a quote I just discovered by Eckhart Tolle:

See if you can catch yourself complaining in either speech or thought, about a situation you find yourself in, what other people do or say, your surroundings, your life situation, even the weather. To complain is always nonacceptance of what is. It invariably carries an unconscious negative charge. When you complain, you make yourself a victim. Leave the situation or accept it. All else is madness.

I really like his affirmation of action. Leaving a situation is usually an option even if it is an option that carries with it certain difficulties. But if we can't or won't leave the situation, then the way to inner peace and happiness is acceptance. And even if we leave, acceptance is still necessary: we accept that the healthy thing for us to have done was to leave.