In plain words
The air spread everywhere goes on moving everywhere. But when this narrowed, this limited air wants to join the all-pervading air, what must we do? As the balloon is blown more and more, it bursts, and the balloon's narrowed … merges into the infinite …. In the same way, this consciousness within the balloon called one's body stays narrowed. It stays a narrowed consciousness, saying “I and mine, I and mine.” But spread this out without end, and it is just this: “The one Ātma, the inner Ātma of all beings, which is in everyone, is in me.” We must develop the feeling of oneness. This and that are one. As we go on growing in this sameness, this narrowed heart scatters in every way and merges into the consciousness of the many. That is why we must simply put away all these narrow feelings. We must develop an infinite feeling. Only then will the world give Ānanda, with happiness and Śānti.
The root cause of these evil ways and misdeeds in the world today is narrow feeling itself. This selfishness and self-interest itself is its root cause. So we do not find with us the kind of learning fit to nurture good qualities. We find with us only an acquaintance with books. There is no use in this. We must enter into practical knowledge. In this practical knowledge we must gain every kind of experience. To experience this practical knowledge, first of all there must be perseverance, Determination. Without it we cannot achieve this practical knowledge at all. Of all the students today, ninety-nine parts stop short at superficial knowledge itself. Book and head. Book and head. These two alone they make one. For what? What good comes to the country from learning like this? What help does it give society? No help at all. Whatever work we do, we must enquire with a broad mind what result it holds for ourselves and for our society. So in the past, in the time of the Upaniṣads, when the ṛṣis sent the children off to the householder's āśrama, they filled their hearts with all these broad feelings and then sent them.
“Satyānna pramaditavyaṃ dharmānna pramaditavyaṃ; kuśalānna pramaditavyaṃ, svādhyāyānna pramaditavyaṃ!”