In the end, we only regret the chances we didn’t take.
The heart of another is a dark forest, always, no matter how close it has been to one's own.
【译文】 司马牛问君子。孔子说:“君子不忧不惧。”问:“不忧不惧,就能叫做君子吗?”孔子说:“问心无愧,何来忧惧?”