The phrase "inner nature" refers to a person's true character, emotions, and personality traits. There are several synonyms for this term that convey varying shades of meaning. For example, the phrase "essence of being" suggests a fundamental or essential quality that defines a person's identity. "Soul" implies a more spiritual aspect of a person's inner nature, while "psyche" is a broader term encompassing a person's mind, emotions, and behavior. "Core self" emphasizes the central, unchanging aspects of a person's personality, while "true self" suggests an authentic or genuine quality. Finally, "innermost being" emphasizes the deepest, most private aspects of a person's inner nature.