Para-Gram by Parmahansa Yogananda

It is not a pumping-in from the outside that gives wisdom; it is the power and extend of your inner receptivity that determines how much you can attain of true knowledge, and how rapidly. You can quicken your evolution by awakening and increasing the receptive power of your brain cells, thus absorbing tremendous and varied knowledge in one lifetime. Calmness, concentration, and intuitional perception will make you a master of wisdom.