An ordinance is an authoritative rule, law, decree, or command. In Christianity it is a symbolic act or ceremony, commanded (thus ordained) by Christ. It is to be distinguished from a sacrament, which is a visible sign that imparts grace or symbolizes the impartation of grace. The difference is very significant. We practice the immersion of the believer in water and observe the Lord’s Supper because we have been commanded to do so by Christ. Such ceremonies do not confer or secure additional grace. The ordinances do not aid in one’s salvation.