In plain words
15. Vidyā is what teaches sacrifice, simplicity and generosity
The will to help others is the chief principle in Vidyā
Though one learns a crore of subjects, if the spirit of sacrifice alone is lacking, all that has been learned is useless. The will to help others is the chief principle in Vidyā. The will to help others is the finest Vidyā. When helping others there must be no selfishness or narrowness in the Manas at all. More than that, one must not help in the hope of a return. One must keep in view the chief yajña of helping others, with no desire for any fruit.