In today's Gospel reading from Matthew 19, from the advice Jesus gave to a rich young man, we see that observing all the commandments may make you holy, but if you wish to be perfect, Jesus advised the young man to sell what he had and give to the poor, and then go follow him. The young man went away sad, for he had many possessions. Attachment to material goods is the greatest, common obstacle that blocks us from following Christ with all our heart. We are not free as long as we cannot let them go. It may not be practical to get rid of all your material stuff, but at least if you are called by God to do so, you should be willing to comply.