How do I know when to open my mouth and when to keep it shut?

I need help knowing when to open my mouth and when to keep it shut! (Even when I know
I’m right.)
My suggestion is for you to reflect on instances when you have said something that you
later regretted, and then ask yourself whether it is more important to be right or more important
to be on good terms with people you know. I also think it’s all right if you express your opinion
if you are able to really hear another person’s opinion as well. It isn’t as important that you both
agree in the end, but more important that you both walk away from the conversation feeling
heard and respected. If you end up saying something you regret, you can ask for forgiveness and
keep trying to do better. We all need grace.