There is no difference between the ultimate enjoyer and the supreme controller. To presuppose any distinction between them is senseless. Ordinary knowledge is simply a quality of material nature, not of the soul proper. The raw substance of material nature is designated according to its different phases. In the mode of goodness, it is known as knowledge, in the mode of passion as activity, and in the mode of darkness as ignorance. Time is another name of the Supreme Personality of Godhead, and another name for material propensity is sūtra or mahat-tattva. The twenty-five elements of nature are the Lord, nature, the mahat, false ego, ether, air, fire, water, earth, the eyes, the ears, the nose, the tongue, the skin, speech, the hands, the feet, the genitals, the anus, the mind, sound, touch, form, taste and smell.