There's an important distinction between obeying what God says, and obeying what He means. His words weren't meant to create the type of legalism Jesus chastised the Pharisees for. Instead, they were meant to guide us into the proper attitude of obedience. If we follow His commands to the letter, but don't let them sink into our hearts, we're missing the point. God doesn't care about strict adherence to rules and regulations; He wants us to be open to the depth of His grace.