One silent night, out over the 

white-chalked hills of Bethlehem, came a gentle cry.

The great ones of the earth did not hear it, for they could not understand how an Infant could be greater than a man.  At the Christ Child's birth, only two groups of people heard the cry:  the Shepherds, who know they know nothing, and the Wise Men, those who know they do not know everything.  The very simple, the very learned... Never the man who thinks he knows everything. 

FJS