In plain words
To do all karmas to please God is Brahmavidyā
When serving, one must not serve in the manner of doing it for one's own satisfaction. One must do it with the feeling that this karma is needed in one's life. This is the inner meaning of Vidyā. Just as bricks and lime are needed to build a house, so the Vidyā that brings a resolve, pure in thought, word and deed, to do one's appointed work is needed for service. Such Vidyā is the key to the nation's progress.