Read: Exodus 14:14, Romans 8:31, Romans 12:19, Joshua 1:9, Deuteronomy 3:22, Mark 14:61, James 1:19
It's not our natural inclination to be silent sometimes.
This is especially true when someone is being rude, abusive in speech, wrongly accusing us, trying to malign our character, misrepresent the truth or a multitude of other things.
We're all growing in grace and in those moments, we are most likely quick to try to defend ourselves, however, we have to be careful to no not rely on our emotions in those moments as often times we can make things worse by our response.
We need to immediately seek the Lord and ask for His wisdom and help to know how to respond which in the moment may be difficult...however, all it takes is a real "in the moment" silent or spoken prayer that will truly help you and I!
We also should remember that there were times when Jesus, even though He had all the authority and facts to do so, He didn't defend Himself when accused.