Otherwise, it has no value. A nice motorcar with nice machine, first class, it has value so long it is driven by a living entity. Otherwise, who cares for it? Nobody cares for it. Jīva-bhūtāṁ mahā-bāho yayedam (BG 7.5). Therefore matter, however valuable it may be, it is inferior to the spirit. The spirit is superior energy of God. Matter is inferior energy of God.
So the material energy is external energy, and we are trying to become happy by adjusting this external energy. That is illusion. Suppose in this life you earn lots of money, make a big balance, and have a very nice skyscraper building and good ladies and friends and position. That's nice, but when you leave this body, you do not know what you are going to become. Suppose, theoretically, you become next life a cat in the same skyscraper building, then what is your value? And there is possibility, because your next body will be awarded by nature according to your work, according to your mind, intelligence. So you may have a very good bank balance and skyscraper building and dozens of motorcar, but you have created your mind just like cats and dog, then you are getting the body of a cat and dog. The most concession will be allowed—because you have got attachment for the skyscraper building—you will be allowed to live there as a cat, that's all. This is the law of nature. So if we are wasting our time in the business of cats and dogs and hogs, just try to understand how much loss you are suffering. The Kṛṣṇa consciousness movement is giving you information: don't be a loser, become a gainer.