"Even a child is known by his doings, whether his work be pure, and whether it be right." Proverbs 20:11
Remember if a child is know by what he does, how much more we are known by what we do! (And, if you don't think children are known by their actions - just ask a teacher! They hear about the "bad" kids the year before they ever get to them!)
Other people are always watching us. How we talk, dress, act, how we handle situations, etc. They will especially be watching what we as "Christians" do! And, don't forget the little eyes that watch and do and magnify everything we do!