A crystal takes on a specific shape, making it distinguishable from others. In the case of thought, crystallization means clarifying and defining its features, so that the intended thought acquires a clear form that separates and distinguishes it from others, preventing it from remaining merely a vague, emotional call. For example, stating that revival is intellectual advancement is a crystallization of the idea of revival, which in the minds of many people takes on a fluid, undefined form. Similarly, defining the mind as the transmission of sensations of reality to the brain, along with prior information used to interpret this reality, is a crystallization of the meaning of the mind, which was fluid in the perception of many.