Over the years, I have had at least as many disagreements with other Christians as I have had with non-Christians, and it is disappointing to look back and see how often those disagreements have become disagreeable. I've been cursed, ridiculed, smeared and dismissed in far more Christian forums than in non-Christian forums. In fact, I was recently banned from two apologetics associations because my personal view of the Scriptural teaching on a particular issue was more conservative than they were willing to contemplate.
The longer that I have been involved in apologetics, the more frequently I have heard Christians advising other Christians to stop quoting Bible verses in defense of the faith. The typical reason given for this advice is that atheists don’t believe the Bible to be true, and therefore, they will just ignore and ridicule those who quote Scripture at them. Unfortunately, I think that this type of reasoning robs Christians of the use of their greatest defense against the forces of evil.
The Bible tells us in Ephesians 6 that we are to “stand against the wiles of the devil” by taking up “the sword of the Spirit, which is the word of God.” Most people that teach on this passage make the mistake of saying that the Bible was given to us as an offensive weapon rather than as part of the defensive armour (yes, I know that I used the British spelling), but that is not what this passage is teaching. The Bible lists the sword as part of the “whole armour of God,” and if you’ve ever watched a film with realistic sword fighting like the 1938 film The Adventures of Robin Hood starring Errol Flynn, then you should already know that a sword is used just as much for defense as it is for offense. A soldier without a sword has very little hope of surviving and absolutely no hope of being able to stand his ground.
"Give instruction to a wise man, and he will be yet wiser: teach a just man, and he will increase in learning." (Proverbs 9:9)