Doing is very good, but that comes from thinking… fill the brain, therefore, with high thoughts, highest ideals; place them day and night before you; and out of that will come great work.
Those who are ignorant of the supreme purpose of life will never be able to attain nirvana (liberation) in spite of their observance of the vratas (vows) and niyamas (rules) of religious conduct and practice of shila (celibacy) and tapas (penance).
The one who has deep knowledge of wide-ranging subjects has the capability to provide solutions to almost every problem. He has the intelligence required to understand the basic nature of the problem and then work accordingly towards finding its solution. He always gives right advice to the right people at the right time.
Only the person having firm conviction and iron volition can attain strength and energy. At no stage of karma does he ever hesitate.

