Mental representations are the mind's way of understanding and communicating countless concepts. One of the big questions in cognitive psychology is how our brain stores and retrieves the meanings of these concepts. Some theories, known as embodied theories, suggest that when we think of a concept, our brain "simulates" or recreates sensory and physical experiences related to that concept. For instance, thinking of an apple might briefly make us imagine its taste, texture, and color. However, there's debate about how these simulations work or even if they're essential. A way to explore this is by studying mental imagery, which is our ability to create pictures in our mind. Some people, due to a condition called aphantasia, can't form these mental images. By understanding this condition, we can gain insights into how our mind uses imagery and simulations. This paper reviews the idea that our cognition is "embodied" and delves into research on mental imagery. It also discusses the emerging studies on aphantasia and how it can help us understand the broader theories of how our mind represents concepts.