Srila Siddhaswarupananda Paramahamsa

If you believe that you are your body, you will strive endlessly to give your body sensual pleasure. You will struggle to fill up your inner emptiness with fleeting sensual flashes. But no amount of sensual pleasure will satisfy you. No matter how many taste orgasms, sexual orgasms, and other kinds of orgasms you may have, you still won’t be actually satisfied. You’ll always have a never ending desire for more.

Jagad Guru Chris Butler - Science of Identity Foundation

There is more than enough food, water, fuel and so on to satisfy the actual needs of everyone on the planet. But there is not enough to satisfy everyone's greed. Even if it were physically possible for you to consume all the food, water, and fuel in the world, you still would not be satisfied. “Material food” cannot satisfy spiritual craving. Since the materialist is never satisfied, he never feels that he has had enough.

Jagad Guru Chris Butler - Science of Identity Foundation