In plain words
Students, boys and girls alike, must strive to shape their daily life into an ideal life on the moral path. It is for these moral ideals that students must live. Facing whatever hardship life brings, they must win complete freedom. ‘Freedom’ does not mean simply roaming at will like beasts and birds. To live with self-respect, self-control, knowledge of the Ātma and the Ānanda of the Ātma: that is the true meaning of complete freedom. Only when he has won such sacred freedom can man lead an ideal life in this world.
The human body is a wondrous machine, like no other. This body is a small world. That man, who wears so sacred a body, cannot give the world an ideal life: this is a sad thing. The body, or man, is the form in which all the limbs come together: eyes, nose, ears, mouth, hands, belly, legs and the rest! No single limb on its own can be the form of man. To understand the divinity of this humanness and to live by it, we must urgently want the body to grow strong, and work at it.
To keep the mind ever moving in the principle of Brahman is brahmacarya
Humility, Satya, Ahiṃsā, not stealing and brahmacarya: these five are the five life-breaths of students. A student is the very form of these five life-breaths; if even one of them is not on its right path, he is left lifeless. For students, boys and girls, the sacred path called brahmacarya is essential at this age. It rests wholly on the moral ideal. All the successes in a man's life rest on his conduct alone. So man must shape his conduct in the right way. The moral life is the backbone of the physical, the worldly, the dhārmic and the spiritual life.