A number of questions come out of 1 Samuel 16:14: What should we understand by the description "evil spirit"? How should we imagine the relationship between the Lord and these spirits? This article argues that the Old Testament fully accepts the existence of supernatural beings, good and evil. The aim of this article is to look at how the Old Testament views spiritual beings and evil spirits in particular. The angels and the references to the "sons of God" and "satan" are also considered.