Curriculum theorizing is the methodology of the theory development. We recognize, two approaches to curriculum theorizing; explanation and understanding. Explanation resemble the processes of theorizing like natural scientist does and understanding is an approach to theorizing with its personal engagement consideration, uniqueness evolve from the complexity of and unrepeatable educational phenomena. In this article, two main ideas, objectivism-reductionism, subjectivism-mystrianism and a branch of the second idea so called; conceptualism are examined. It is argued that all three ideas are corresponding with the explanation or understanding and so their deficiency in human life is determined. It is argued that neurophenomenology could be considered as a remedy for the fragmental deficiency and incompetence of the current dominant positions in curriculum theorizing. We called the neurophenomenology inspired theorizing as; "understanding explanation" and explain it in reference to the Varrellas, Varela's methodology of reciprocal constraints.