The Aztecs were an ancient American culture that lived centuries ago. They used something called entheogens (en-thee-o-jens). Entheogens are things like plants, mushrooms, and other natural medicines that people eat or drink to help them feel closer to the spirit world. For the Aztecs, this meant that they could talk to their gods and feel connected to them. They believed that it was a way to be closer to the gods, and it was also used for healing and to help them understand the world around them.