Example is more forcible than precept. People look at me six days a week to see what I mean on the seventh. -Cecil
1Timothy 4:12 Let no man despise thy youth; but be thou an example of the believers, in word, in conversation, in charity, in spirit, in faith, in purity.
Christians have a duty to lead by example. We must therefore be careful how we: carry ourselves, whom we associate with, where and what we spend our time doing, what we speak, how we live, how we lead, how we love, and what we have faith in. Christians are always examples; you can never tell if the person you saw in the grocery store will walk in your church on Sunday.