克己复礼 originally comes from the Analacts: "to subdue one's self and return to propriety", it's regarded as a virtue in Confucianism.

守惠藏拙 probably should be 守愚藏拙，it has its origin in the Laozi: “大智若愚，大巧若拙”， a man with great wisdom appears like a fool, a man with great skill appears like dull.<br/>The words suggest to conceal one ' s ability