God does not tell us things without a reason. God does not do anything without a reason, for that matter, but nothing that God instructs us to do is arbitrary. God always has a good purpose in all these things, whether we can see the reason or not! In fact, an important lesson of the Christian walk is simply trusting God in that regard: recognizing that whatever He leads us to do is best. This will be a major lesson at Jericho this Sunday: the silence, the trumpets, the marching… none of it is arbitrary. Instead, our faithful worship matters.