Those words "There is enough for everybody's need and not for anybody's greed" were written by "Gandhi jii". Yeah i agree with the given statement because we know any person who is poor always dreams to have more food, money and even luxury etc; now the rich one always thinks of more and more money this rich one is not at all satisfied with his money.
The four reasons are :
1. Well the above situation of rich and poor is a good reason, that both need money, the rich person has more money from before yet he needs plenty money, the poor although has only some rupee in his torn pocket he can't even get a note of hundred because the rich one always have high position.
2. "We are living on the earth, we need ti be part of it but yet now a days we are trying to make earth a part of us", by this we can say that the people are not satisfied with what they have instead they want more.
3. There are some people who kill animals for the home's accessories. Here these people are not satisfied with what they have instead they are killing other animals for their own luxury and name sake.
4. The man is destroying the whole nature and he is trying to be the one who can rule the whole world and all other organisms, Here the man is not at all satisfied with that he has instead he wants more.
By this i conclude that yeah man is too selfish that he wants more and more even though he has something with him. There these words given i.e. "there is enough for everybody's need and not for anybody's greed"