Comfort zone
The comfort zone is a psychological state in which a person feels familiar, at ease, in control and experiences low anxiety and stress. In the zone a steady level of performance is possible.
Bardwick defines the term as "a behavioral state where a person operates in an anxiety-neutral position." Brown describes it as "Where our uncertainty, scarcity and vulnerability are minimized — where we believe we’ll have access to enough love, food, talent, time, admiration. Where we feel we have some control."