This study is to examine the proximity of thoughts of post-materialist science based on the correlation between science and consciousness, and Donghak which contains the essence of life thought. The invisible quantum world is not just a world confined to the micro world of quantum physics, but it is a world of our own true self, a realm of ‘inner self’, and is linked together with the macro world we live in. The proximity of thoughts of post-materialist science and Donghak lies in the perception of the holistic nature of life. Donghak’s view of life that transcends the dichotomous thinking system is essentially in line with the quantum mechanical view that the quantum system has nonseparability or nonlocality and is wave, while at the same time having the properties as particles complementarily. Also, the God rediscovered by post-materialist science is essentially in line with the Hanul(天) of Donghak. This attempt to connect science with spirituality will create a synergy effect that involves a profound philosophical and scientific understanding of life through the mutual feedback process, which is the approach to spirituality through science and the approach to science through spirituality. The true self is the Hanul(天), the quantum God, and the ‘I’ as the universal reality, that is, the life and the truth.