As there is theoretical knowledge and practical knowledge in scientific advancement, so simply theoretical knowledge will not help me. Theoretically I may know that I am not this body, but practically it must be known. If not, if I am not this body, then I am soul. Then I am working here in this world only for my body. What I am doing about my soul? That is knowledge. Suppose I have got this coat and pant and hat. If he simply tries, dry clean the coat and do not put any food in the stomach, how long this civilization will go on? Starving. So the whole world is in disturbed condition because there is no spiritual food, only material cleansing the shirt and coat. That is going on. Like cats and dogs, they are interested with the body.
So sa-vijñānam... Actually we must know what we are and what is my real business. That is stated in the Bhagavad-gītā. You should carefully note it that when I understand that I am not this material body, ahaṁ brahmāsmi, I am spirit soul, I am Brahman... Kṛṣṇa is Para-brahman, and we are Kṛṣṇa's part and parcel. We are also Brahman. Not that by knowledge I become Brahman. I am already Brahman. By ignorance I am thinking not Brahman. Ahaṁ brahmāsmi, "I am spirit soul; I am spirit." That is my actual position. And when you understand your actual position and act accordingly, that is called mukti. Muktir hitvānyathā rūpaṁ sva-rūpeṇa vyavasthitiḥ. When you understand that we are not this body... We are working whole day and night like cats and dogs, the hogs. The hog is also working day and night. Hog, what is his business? "Where is stool?" That's all. "Where is stool? Where is stool?" And as soon as he gets stool, he eats it, become fatty because stool contains all the vitamins. That is the essence of all good food that you take, and the essence is rejected. But it is scientifically true. Perhaps doctor will admit. Stool contains all hydrophosphates. Is it not? Then who is going to eat stool? Hydrophosphates is very good for brain, but now eat. Therefore these hogs very easily become fat. You see? So does it mean that we shall work very hard where to find out where is stool and then become fat and somebody will eat me? This is not civilization. Civilization is that you must know what is your real position and act accordingly, and then you become liberated. Sva-rūpeṇa vyavasthitiḥ. That is perfection of your life. Don't be misled by the bodily concept of life.