I love the Swedish concept of 'lagom'.

The Lexin Swedish-English dictionary defines lagom as "enough, sufficient, adequate, just right." Lagom is also widely translated as "in moderation," "in balance," "optimal," "reasonable," and "average." But whereas words like "sufficient" and "average" suggest some degree of abstinence, scarcity, or failure, lagom decidedly carries the connotation of perfection. The archetypical Swedish proverb "Lagom är bäst," literally "Lagom is best," is translated as "Enough is as good as a feast" in the Lexin dictionary.