kedārebhyas tv apo 'gṛhṇan
karṣakā dṛḍha-setubhiḥ
yathā prāṇaiḥ sravaj jñānaḿ
tan-nirodhena yoginaḥ
kedarebhyah -- from the flooded fields of rice paddy; tu -- and; apah -- the water; agrihnan -- took; karshakah -- the farmers; dridha -- strong; setubhih -- with dikes; yatha -- as; pranaih -- through the senses; sravat -- flowing out; jnanam -- consciousness; tat -- of those senses; nirodhena -- by the strict control; yoginah -- yogis.
Srila Prabhupada comments, "In autumn, farmers save the water within the fields by building strong walls so that the water contained within the field cannot run out. There is hardly any hope for new rainfall; therefore they want to save whatever is in the field. Similarly, a person who is actually advanced in self-realization protects his energy by controlling the senses. It is advised that after the age of fifty, one should retire from family life and conserve the energy of the body for utilization in the advancement of Krishna consciousness. Unless one is able to control the senses and engage them in the transcendental loving service of Mukunda, there is no possibility of salvation."