自觉自愿

Explanation: Their consciousness and will. 　　Usage: Joint type; as object, adverbial; means to act consciously 　　Source: Erfu "Bethune" Ten more precious is the basis of class consciousness, purely voluntarily, without a shred of compulsory nature. " 　　Examples: We want to voluntarily protect national and ethnic interests. Thesaurus:  Fame or fortune, Willingly, willingly, for two pins, Willingly