Worship is one of the great notions of Islam. The wisdom for which Allah created what is. The faithful therefore asked a scholar to explain it: What is adoration? Its different types? What does it correspond to? Does she understand all aspects of religion? Is it the highest spiritual station? A learned theologian, Shaykh Al-Islam Ibn Taymiyya tries here to clarify the meaning of worship, servitude, its foundations and other principles. These answers serve as a reference for a correct understanding of religion.