Four modes of life, O child, have been laid down in this world. Wherever men live the means of maintenance come to them of themselves.
चतुर्विधा हि लोकेऽस्मिन् यात्रा तात विधीयते। मा यत्रावतिष्ठन्ते सा च कामात् प्रवर्तते॥