When citing synonyms for "be/feel/seem himself", several expressions can be used to describe a person's mood, personality or behavior. Some of these synonyms consist of "be in good spirits," "feel like oneself," or "seem like one's true self." Other options include "be authentic," "be at ease with oneself," or convey a sense of "being comfortable in one's own skin." These phrases suggest a person's state of mind and behavior are congruent with their nature. Additionally, "displaying authenticity," "exhibiting genuineness" or "projecting sincerity" are other ways to convey a sense of being oneself. All these synonyms aim to describe a person's true self and character.