Accepting fault

I think I always worry about faults. According to my exsiting opinion, I feel unhappy or embarrassed when I'm faced with my faults. I also used to blame other's for there mistakes especially my husband or my son. Today, we talk about "3 rules to live" at ESL class, the teacher asked us to share our opinion. " Don't judge" one classmate said. I was shocked by this rule. He didn't explain this rule. I think, maybe because I wanted to "judge" someone.

I'm easily embarrassed myself and try to blame others. Maybe I should understand If something doesn't work as my I wish accepting it calmly is better than blaming others.