Micah 6:8

He has told you, O man, what is good; and what does the Lord require of you except to be just, and to love (and diligently practice) kindness. And to walk humbly with your God (setting aside any overblown sense of importance or self-righteousness).

Our attitude is always our choice, and if we limit our negative reactions to circumstances, we can walk in love and be kind. It may take time and practice to suppress the flesh and let the spirit lead, but it makes a massive difference in our peace. As we walk humbly with God, we can grow in our spirits and overcome the flesh.