It is your duty to train and develop your mind and acquire knowledge, as much knowledge as you possibly, can obtain. Knowledge is like a deep well, fed by perennial springs and your mind is the little bucket that you drop into it you will get as much as you can assimilate. The Brain, which is the physical organ of the mind, is one of the two precious products of the aeons of evolution : the other is the imponderable 'Social instinct. 
Knowledge and mental self-culture will confer untold blessings upon you. You will not be the victim of superstition and demagogy in religion and politics. You will know your duty and do it. To be wise and independent in your religion and your politics, not be doped and duped by the selfish priests and the scheming politicians of Capitalism and so called Socialism: is this not a noble aim worth striving for? Most men and women today are not free and wise: they are like kites flown by the priests and politicians who hold the string.  What, according to the passage, is the duty of human beings?