In plain words
Without doing karma it is not possible to gain Jñāna.
Without studying in primary school, one cannot join a higher secondary school. Without studying in higher secondary school, one cannot join a college. The primary school may be compared to the path of karma, the higher secondary school to the path of upāsanā, and the college to the path of Jñāna. Through the path of Jñāna we can take the degree of Mukti. To gain this right, one must begin from the path of karma. To make the body worthwhile, one must do karma; to make the karma of the body worthwhile, one must carry out one's duties. If time, karma and duty are followed, humanness attains fullness.
That is full, this is full; from the full the full comes forth; taking the full from the full, the full alone remains.
In acquiring an education today, people keep in view only a means of living, but do not keep the supreme goal of life as their aim. Being born, growing up, earning: that is wasting one's life. If this is all life is, what use is it? Life must be made worthwhile. We must think over what it is we should seek in the world, and through what it is possible to experience Ānanda. Through a means of living one can get by for a while. But to gain the good fortune of life's supreme goal, one must take refuge in the principle of the Ātma alone. The body, Manas, Buddhi, citta, the senses, the antaḥkaraṇa: which of these is permanent? Which is impermanent? Whatever object we see, it may give us joy for a while. But afterwards that same thing turns into a cause of sorrow. In the world there is nothing that is eternal. The principle of the Ātma alone is eternal. To know this principle of the Ātma, one must follow the spiritual path alone. But for this the spirit of tyāga is needed. In tyāga itself there is yoga. There is kṣema. This we do not understand.