When you call someone “untrustworthy” or “ungrateful”, turn the reproach on yourself. It was you who did wrong by assuming that someone with those traits deserved your trust. Or by doing them a favor and expecting something in return, instead of looking to the action itself for your reward. What else did you expect from helping someone out? Isn’t it enough that you’ve done what your nature demands? You want a salary for it too?

~ Marcus Aurelius, 9.42