In plain words
The gurus of those days were free of selfishness. Pure of heart. Men who held the feeling of the Supreme Principle. Men steeped in the principle of Prema. For the good of their students they went on dedicating their very lives. The students of those days too bound themselves to that discipline and kept it to the letter. If anyone disobeyed their command, they would not let such a student come even into the places round about. Those gurus would not tolerate a person who had the akāra-pañcaka of evils. Of the five evils that begin with the letter a, the very first is alakṣya. The second is avinaya. The third is Ahaṅkāra, the fourth asūya. The fifth is asabhya. One who has these five in him is in no way fit to be a student. First of all, you must not be careless. You must not show discourtesy. Ahaṅkāra is more dangerous still. This Ahaṅkāra makes a man forget his very self. Then envy: this is the very form of great sin. Then asabhyatā. Asabhya means to live, as a human being in society, against the noble feeling with which one ought to live there: that is asabhya.
Many disciples came to Vyāsa for the study of these Vedas. The first among them was Vaiśampāyana. He was one who, with Bhakti and śraddhā, with humility and obedience, bowed to his guru's command, kept it, and made his life fruitful.
Good qualities, good sense, devotion to Satya, Bhakti, discipline, the doing of one's duty: these are what education teaches; these the student must learn.
Having learnt in this way at his guru's side, Vaiśampāyana in his turn founded a gurukula to teach the Veda. People think a gurukula is something formed only by certain practices and certain special rules. That is not a gurukula. Guru plus kula. The guru's house itself was their home. In those days what the guru ate was itself given to the disciple as prasāda. Night and day they spent their life with the guru alone. So food and the way of life, everything, were the same for guru and disciple. That is why the feelings of the two were one as well. Food being one, the head too was one.