선 인 선 과
Sun in, sun ka. Stated simply: good intention, good results. You reap what you sow. The golden rule. Karma is a *%^#@. However you want to say it, this is how I try to teach, and what I try to pass on to my students. I also fail this quite regularly, but I'm working on improving over time.
Attribution: I first heard this from Master Dan Segarra of the Warrior Scholar Academy.