To celebrate Easter and Passover, we started a series on Moses, Exodus and the Ten Commandments. According to many Jewish mystics, the Torah may be considered on many different levels. One of these levels is the symbolic and metaphorical level. I'll be approaching this series from this level. Thus this is the ninth or tenth commandment.
Desires are good.
They push you to achieve. When you change your desires to envy, you slow your achievements. This is the true meaning of this commandment. Appreciate the good things of life. When you appreciate something or someone its value for you goes up.