31   The four prominent features of autumn are that there is no water in the sky, the weeds that grew here and there in the rainy season all wither away, the muddy roads and fields dry up, and the ponds of water become crystal clear. These four features of the autumn atmosphere are compared to the four orders of life.
In the  varṇāśrama  system the student goes to the  āśrama  of the master to take lessons from him and serve him, even as a menial servant. These troubles of the student are at once mitigated when he attains transcendental knowledge in terms of his relation with Śrī Kṛṣṇa, the Personality of Godhead. As the white clouds no longer bear the burden of water in the autumn sky, the student finds that the troubles of drawing water for the master becomes a burdenless job if the student, by the grace of his master, attains to spiritual knowledge.
Householders who beget children without restriction, like weeds in the rainy season, become solitary as soon as they attain to the stage of devotional service. The family planning of a godless civilization cannot check weedlike unwanted population. People should learn to check sex life by voluntary restraint. This voluntary restraint is possible when one is dovetailed with the service of the Lord. This is confirmed in  Bhagavad-gītā .
viṣayā vinivartante nirāhārasya dehinaḥ rasa-varjaṁ raso'py asya paraṁ dṛṣtvā nivartate
“The embodied soul may be restricted from sense enjoyment, though the taste for sense objects remains. But, ceasing such engagements by experiencing a higher taste, he is fixed in consciousness. (Bg. 2.59)
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