What is the need of Brahma Vidya?

ANY AMOUNT OF MONEY FALLS SHORT OF BUYING EVERLASTING HAPPINESS The richest like Bill Gates and Warren Buffett have the same definition of success—and it has nothing to do with money but it is in finding everlasting happiness
ANY EFFORT OF KNOWING IS ONLY TO SURFACE MORE OF UNKNOWNS The most intelligent Einstein also admits-

“I seem to have been only like a boy playing on the seashore, and diverting myself in, now and then, finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.”

It indicates that human’s effort of “knowing” has only surfaced more of “UNKNOWN’s” and any arrangements of happiness have only proved “less” than “everlasting”.

Has human race ever known the source of everlasting happiness?

Has the human race ever reached in the “zenith of knowing” after which nothing remains unknown?

The answer to both is YES.

If you notice carefully, all efforts of “knowing” and finding happiness is now ignorantly outward within the dimension of inertness in the modern era. However, those who have known Brahma Vidya dwelved inward in the dimension of consciousness, to finally obtain the treasure of ultimate bliss and wisdom.  

The need of Brahma Vidya is in knowing this science of consciousness  through which one discovers the ultimate wisdom and the ultimate bliss.