Luo Qin-shun had criticized Chang Tsai who had advocated the discrete in principle and qi. This is because he had advocated the principle of qi and qi are intimate but not the same thing, and he had valued the principle more than manifestations. He had also emphasized the distinction between dao-xin(道心) and ren-xin(人心), and he also had valued the importance of dao-xin(道心). But Chang Tsai had persistently thought the metaphysical and physical through the motion of material force, and he had one-sidedly emphasized the metaphysical. So he had emphasized the Great Vacuity, the Spirit and the nature of Heaven and Earth. Therefor the consistent context of "returning" is the same philosophical attitude between Luo Qin-shun and Chang Tsai.