something that is certain

positive assurance

the quality of being firm, faithful, unchanging

fixedness

calmness of mind or temper

levelheadedness

the state of being balanced (especially mentally or emotionally)

balance; evenness

the quality of being moderate

temperance

exactness

readiness

the state of being systematic, on time etc

evenness

medical treatment using sedatives

temperance

the quality of being strong

stamina, mental or physical

the ability, willingness, to allow and accept opinions, beliefs, customs, physical types, behaviour etc different from one's own

fortitude, grit