Every individual who has in him an element of true greatness is to some extent humble. The musician listens for the music he writes; the inventor opens his thought to the discovery of existing wonders; and the mathematician follows the principle of mathematics, recognizing that his mathematical ability depends upon his adherence to this principle. It is the thinker's humility that enables him to express his greatness.
While humility is important to greatness in human endeavor, it is essential if one is to express the greatness of God, divine Principle. Mary Baker Eddy writes in "The First Church of Christ, Scientist, and Miscellany" (p. 194), "Only those men and women gain greatness who gain themselves in a complete subordination of self."
Spiritual humility could be defined as a willingness to subordinate self by steadfast adherence to God, the one cause or divine Principle. It means a willingness to listen to God and to accept what He is saying, no matter what personal sense may be claiming to the contrary.