In plain words
Only when the meaning of this humanness is known can one speak of the human race. One must not call oneself a man on the strength of one's form. The power to examine what is eternal and what is passing is most necessary to humanness. That is the keenness of the Buddhi within us. It must be joined with morality and discipline. More than this, we must join it with humility and obedience. Only when we develop these qualities can we recognise true humanness. We must try to teach the children such things whenever the time allows.
Spiritual thinking is not put in from outside; it must come from the heart
Teachers! As far as you can, as far as your strength and ability go, you are teaching without wasting them. That gives us satisfaction. But you must develop it still further and work to make the children grow with still more enthusiasm. Do not give any room at all to the fear of what will become of their future if we teach the children much of spiritual things. Theirs is not a nature that turns to sannyāsa so quickly. Besides, there are always many great souls who become sannyāsīs even if we do not teach them. And there are any number of people who, whatever is done, stay like a rock, like a boulder, and never change. This is not something put in merely from outside. It must grow from the heart. Such a great attainment comes only to such people; just because all are taught, they will not all sit down as sannyāsīs. Such a great attainment may come to them through the merit of many births. So without the least hesitation you must teach them these spiritual and moral matters well, now and then. That is true learning.
Hiraṇyakaśipu called Prahlāda. "My son! Tell me which Vedas, which Upaniṣads, which śāstras you have studied," he said.