“Bless them which persecute you: bless, and curse not.” Romans 12:14

One thing that should not be found on the lips of a Christian are curses and curse words, only blessing and God’s word should be found on your lips towards all men.
“Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.” Ephesians 4:29
You are full of grace, be gracious with your words; even more, let your speech be an expression of kindness towards others- become better in how you talk to others.
Remember this verse?
“Train up a child in the way he should go: and when he is old, he will not depart from it.” Proverbs 22:6
The word “he should go” actually is from the Hebrew “peh” which means “mouth”; so what he actually said was train a child’s mouth; so you can train yourself through God’s word to speak right and respond with grace.
“For in many things we offend all. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body.” James 3:2

Bible Reading Plan: Psalm 143, 2 Kings 2