In plain words
The kinds of learning you take up in this present age fall only under avidyā; they cannot be true vidyā. So you cannot become great merely by learning these. Through avidyā it is only avidyā that grows; vidyā does not flourish at all. You must try to recognise the difference between vidyā and avidyā. To think, to decide, and so to come to know the true principle: that is vidyā. To babble whatever comes to the tongue, without enquiry: that is avidyā. To recognise one's own true nature, to teach it to others and to experience Ānanda: that is man's chief duty. First we must gain experience. That experience we must explain to others.
Just as current flows through a wire, a divine power moves through the human body from the tips of the nails to the crown of the head. Man's whole being is filled with that very power. That power has no particular form of its own. Our working, speaking, walking, reading, writing … all these take place through that power alone. When one develops it, even an ajñānī becomes a great jñānī.
The service you do, you do for yourselves
“We have finished our studies. Now we are taking part in service activities”: do not think like that. You must remain students always. What is more, it is a great mistake to think that you are taking part in service for others; you are doing it for yourselves. Do not hope that, because you have joined this organisation as members, others will ‘help’ you.