We often think if God as being mean for  giving us the law to obey but he had thoroughly demonstrated his love long before the law was given.  The law itself is a reflection of his love, providing a set of common-sense rules for living in the household of God.  Jesus gives us the only example of someone who kept the law perfectly but he does not fit our model of someone who keeps the law.  He seemed to be relaxed and focused on others unlike the Pharisees who were supposed to be the best at keeping the law in their day.  Jesus satisfied the requirements of the law so that we no longer need to be slaves to it but it remains the loving, household rules for the family of God.