R' Shlomo Carlebach z'l
Whatever you do, don’t let your mistakes drag you down. Imagine on Shabbos, it was not Shabbosdik for five seconds. I can sit and krechtz, oy, oy, oy, but in the meantime you are losing more of Shabbos right now. So five minutes ago you spoke about the stock market, and it was wrong.
Forget it, start talking about Shabbos.
