In plain words
Teachers! Students! Lovers of learning!
This whole world, conjured up as what is seen, is a single university. Within it each and every human being is bound to learn the first lessons: eating, drinking, speaking, walking and the like. So in this university Prakṛti herself is the very first teacher. Second: when a human being is born, he is born like a beast. The parents give him the training fit for it and develop the humanness within him. If the parents did not give them such training, they would live on as no better than beasts. So the second gurus are the parents. But all the holy ancient ṛṣis held that it is not enough merely to develop the humanness in man, and to shape it in various ways they began another learning, called saṃskāra. This saṃskāra was begun not only to develop humanness but to root out the beast in man.
What does this saṃskāra mean? It is not some special craft. To put away the bad habits in a human being and to foster good habits: that is saṃskāra. Saṃskāra is what came into being to lead the pravṛtti nature in a human being onto the path of nivṛtti. It is not some this-or-that thing. Every object created in the world has its saṃskāra. A human being cannot enjoy any object until it has been refined. One example. Man grows paddy. But the paddy he has grown he cannot eat or enjoy just as it is. To refine that paddy means to take off the husk on it and turn it into rice, and then that rice can be enjoyed. What is the paddy worth before its refining? A sack may be worth a hundred rupees or so. But by refining it, a sack of rice turns into five hundred. The value goes up as well. Through this saṃskāra an object not only becomes fit to be enjoyed but takes on value.