In plain words
A man who cannot find out why he was born and why he grew up is, one may well say, a waste of food and a burden on the earth. Having taken a human birth, you must recognise your own true nature and follow your own Dharma. You must not compare yourselves with others, nor imitate others. Imitation points to weakness of mind. Suppose you learn that someone found a bundle of money in a certain place, and you go there in the hope that you too may find a bundle of money: you may lose the money in your own pocket! So imitation is a very bad thing. Imitation is a weakness; Creation is divine. You must recognise this truth. To reach a high level in learning you may imitate a little, but in other matters imitation is of no use.
“Paropakāraḥ puṇyāya ....”
Students! Your games and songs have delighted everyone. But every moment you are playing the game called life. Win the victory in that game. Life is very precious and great. You must not waste such a life. To waste time is to waste life itself! So take part in good deeds. Help your fellow men. “Paropakāraḥ puṇyāya pāpāya parapīḍanaṃ.” Help Ever, Hurt Never.
Help always, and only help. Hurt no one. The Kauravas went on tormenting the Pāṇḍavas without end. As a result, what a fate overtook the Kauravas. Dhṛtarāṣṭra, the father of a hundred sons, was left at the end without a single son to offer him water. Kṛṣṇa told Arjuna this even before the war:
Rise, Dhanañjaya! Fate is strong; justice will win, self-interest will perish; this, always, is the Dharma of the age, is it not? See now: at the very end, even for the father of a hundred sons there is no one to offer the piṇḍa, alas! when the stars go against him.