Those who worship God in the hope of attaining reward (of Paradise) are not real worshippers, they are business men for they desire reward as a recompense of their worship. Those who worship God out of fear (of punishment) they are slaves for they desire protection as recompense of their worship. Whereas those who worship God to be grateful towards their Creator, they are the free people, for they desire no recompense for their worship but the pleasure of their Lord, and their worship is the real one Imam al-Hussayn (as)