When we feel love and kindness toward others, it not only makes others feel loved and cared for, but it helps us also to develop inner happiness and peace.
The Dalai Lama

When I read this quote by the Dalai Lama, I thought about the times that I’ve lost my patience and said or done something that I immediately regretted. The embarrassment and guilt from those types of situations can sit with me for days while I rehash them in my mind and wonder about possible outcomes.
Obviously, there’s another problem there of living in the past instead of living in the present, which isn’t healthy on its own, but all actions have consequences. I think this is something the Buddha was aware of and is an important part of the idea of karma. The things we say and do that we might wish we could take back not only create guilt and bad feelings between us and other people, but, according to Buddhist teachings, they also add negative karma which can come back to visit us in this life or the next.
So, sure, live in the present, but it’s also important to help that along by not doing things that anchor us in the past. In other words, spending more time listening and thinking before speaking or doing so that we don’t get stuck in a cycle of worry and anxiety. I’m not saying that to preach to anyone. It’s more of a personal reflection and a reminder to myself to be vigilant as a means of improving my mental clarity, focus, and quality of sleep.
I’ve come to believe that simplicity is best, and the simplifying process doesn’t have to be restricted to discarding or giving away unused goods, it can also be a simplification of mental burdens by removing unnecessary worries and stresses by doing and saying the right things at all times. It’s like that old adage about not lying, so you don’t have to maintain the mental burden of remembering which lies you’ve told to which people.
As for what the right thing to do and say is, well, that’s more subjective and depends on context.