The Great Epic of the Bhārata dynasty 12.208.20

12.208.20

atha vā na pravarteta yogatantrairupakramet |
yena tantramayaṃ tantraṃ vṛttiḥ syāttattadācaret || 20 ||

Upon the mind being thus brought under control and the senses being all subdued, the senses will become luminous and gladly enter into Brahma. When one's senses are withdrawn into the mind, the result that occurs is that Brahma becomes manifested in it. Indeed, when the senses are destroyed., and the soul returns to the attribute of pure existence, it comes to be regarded as transformed into Brahma. Then again, one should never make a display of one's yoga power. On the other hand, one should always exert to restrain one's senses by practising the rules of yoga. Indeed, one engaged in the practice of yoga rules should do all those acts by which one's conduct and disposition may become pure. (Without making one's yoga powers the means of one's subsistence) one should rather live upon broken grains of corn, ripe beans, dry cakes of seeds from which the oil has been pressed out, pot-herbs, half-ripe barley, flour of fried pulses, fruits, and roots, obtained in alms. Reflecting upon the characteristics of time and place, one should according to one's inclinations observe, after proper examination, vows and rules about fasts. One should not suspend an observance that has been begun. Like one slowly creating a fire, one should gradually extend an act that is prompted by knowledge. By doing so, Brahma gradually shines in one like the Sun.