What we are slaves to will prevent us from praying to God. If we are slaves to all the thoughts we think, if we are slaves to everything our eyes see, if we are slaves to all the music our ears hear, if we are slaves to everything the nose smells and the tongue tastes, if we are slaves to everything the body wants, then how can we ever reach a state of peace? We can never know peace or tranquility this way. We have to escape from this slavery and become a slave only to God.