No arguing allowed.

II Timothy 2:23-26
Refuse to get involved in inane discussions, they always end up in fights. God's servant must not be argumentative, but a gentle listener and a teacher who keeps cool, working firmly but patiently with those who refuse to obey. You never know how or when God might sober them up with a change of heart and a turning to the truth, enabling them to escape the Devil's trap, where they are caught and held captive, forced to run his errands.

It is many times difficult to keep my mouth shut when I hear people at school, at work, or at home say something that goes against God's teachings, but this verse supports the idea that arguing is not the answer when dealing with people who are not living according to God's laws. The last thing I want to do is back someone into a corner and cause them to stubbornly hold on to an unhealthy lifestyle because I have been too forceful or argumentative with God's teachings. These verses tell me to listen and keep cool and patient. Even among Christians we sometimes disagree about the way to worship, what to wear to church, what kind of music is appropriate, but it does not honor God for us to argue and bicker about such minor issues.
I do not want to be a barrier to my friends and family members who are not Christians. I don't want their pride to get in the way if the Holy Spirit is speaking to them. The worst thing I can think of is for them to refuse salvation to prove a point to me.