Upper level: b126 Temperament and personality functions
(Conviction)
Mental functions that produce a personal disposition that is self-assured, bold and assertive, as contrasted to being timid, insecure and self-effacing.
(additional explanation: The one to conflict with cowardice, instability, and self-negative by mental function to give birth to personal nature expressed like confidence, boldness, and self-affirmative, etc.)