自知之明: know one's limitations; have a clear estimation of oneself; know oneself; know oneself well enough; know one's place; know one's strengths and weaknesses; (have) the wisdom to know oneself
无自知之明: overestimate oneself; have too high an opinion of oneself; ignorant of one's own limitations; lack of self-knowledge; not have a proper appraisal; suffer from self-delusion