sincerity

(noun) an earnest and sincere feeling. Synonyms: earnestness, seriousness.

(noun) the quality of being open and truthful; not deceitful or hypocritical. Examples: "His sincerity inspired belief." "They demanded some proof of my sincerity."

(noun) a quality of naturalness and simplicity. Synonyms: unassumingness. Example: "The simple sincerity of folk songs."

(noun) the trait of being serious. Synonyms: seriousness, earnestness, serious-mindedness. Example: "A lack of solemnity is not necessarily a lack of seriousness"- robert rice."