All things are lawful; but not all things are expedient. All things are lawful; but not all things edify.
1 Corinthians 10:23 (ASV)
With this one short verse, Paul describes one of the great responsibilities found within true spiritual maturity.
Part of walking as a Christian is standing up for Christ who we serve. This means that before the world the Christian is to be neither passive, nor timid. Instead, when challenged, maligned, or merely questioned, the Christian should be ready and willing to answer. Peter described such an attitude in his first epistle, encouraging Christians to:
…sanctify Christ as Lord in your hearts, always being ready to make a defense to everyone who asks you to given an account…
1 Peter 3:15a (NASU)