The Prophet was sent to teach us how to purify the heart from the lower qualities of the ego, such as jealousy, envy, greed, lust, and arrogance through the practices of repentance (tawba) and remembrance (dhikr). The Prophet taught us that what we see in the world is a reflection of what we carry within us, and so in order to transform our lives we must transform our hearts. If we do good deeds but have a rotten heart, we are in a state of hypocrisy. If we have a good heart but do not do good actions, then we are in a state of illusion.
