In this article, I present a model of four dimensions for the idea of learning in the classical Confucian perspective. This model is intended to capture the most essential four aspects of learning which explain why self-cultivation of a human person toward an end of self-fulfillment and social transformation of humanity is possible. I shall also show how this model illuminates all basic uses of the term "xue" (?, learning) in "the Analects" and thus leads to a more coherent understanding of the Confucian moral and ethical philosophy than have been previously done. A copingstone principle of sincerification is also suggested for enabling the advancement of a person to a higher status of life such as junzi (??a learned person) and shengxian (?? sagely person).