The abstract nouns "mind" and "wisdom" can be expressed with "think" and "wise" or "wisely." Why a wise mind is needed can be stated clearly. Alternate translation: "A wise mind is needed in order to understand this" or "You need to think wisely in order to understand this" (See: [[rc://en/ta/man/translate/figs-abstractnouns]] and [[rc://en/ta/man/translate/figs-explicit]])