The first commandment , according to Church teaching , " mean that [ followers ] must worship and adore God alone because God is alone . " The Catechism explain that this prohibit idolatry , providing examples of forbidden practices such as the worship of any creature , and of " ' demons ... power , pleasure , race , ancestors , the state [ and ] money ' " . Augustine interpreted this commandment as " Love God and then do what you will " . Explaining this sentiment , Kreeft state that all sin " serve some other god , obey another commander : the world or the flesh or the devil " , if God truly am loved then one will do what God wills .