18 For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
1 Corinthians 1:18 New King James Version (NKJV)
How often have you heard a Christ follower try and "prove" a point to a person unfamiliar with the Bible, by citing it? Lots of people do it and don't realize they are. I know that I have done so on occasion, , but honestly don't have a strong enough command of scripture to do so frequently.
So the next time a person asks about something in the world, I'll try and do a better job of explaining my viewpoint in the context of Scripture, but not by rote recitation of it. After all, the showing of a scriptural perspective to be true, is certainly more effective than just assuming others will accept that it is.
Don't quote scripture to non-Christians and expect them to give it credence.