Mulla Sadra has studied angles with a religious approach in detail in some of his works like mafatih ul-gheib and al-mabda' wa al-ma'ad. As he believes, the essence of an angle is a spiritual entity created by God to deliver grace and to cause man to attain awareness and discover the truth and recommend what is good. Carrying message, closeness to God, obeying Divine orders, much ability, be afraid of God, permanent praise, lack of sexuality and marriage, and infallibility. In some cases such as the last property, he presents his proofs. Furthermore, in many cases, he has tried to show that angles are the same as sphere souls and intellects. In this way, a kind of harmony can be seen between his philosophy and religious thought.