“If you believe in the future life and, instead of preparing for it, sell it in order to buy this world, then that is folly! You do not normally sell two things for one; how can you give up an endless life for a limited number of days.”
The Deliverance from Error https://www.amazon.com/Al-Ghazalis-Path-Sufism-Deliverance-al-Munqidh/dp/1887752307
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Abu Hamid al-Ghazali 37
Persian Muslim theologian, jurist, philosopher, and mystic 1058–1111Related quotes

“How can you buy or sell the sky, the warmth of the land?”
Misattributed

A comment he made in persuading John Sculley to become Apple's CEO, as quoted in Odyssey: Pepsi to Apple: A Journey of Adventure, Ideas, and the Future (1987) by John Sculley and John A. Byrne
1980s

Credo (1901)
Context: I believe in the Motherhood of God.
I believe in the Blessed Trinity of Father, Mother and Child.
I believe that God is here, and that we are as near Him now as ever we shall be.
I do not believe He started this world a-going and went away and left it to run by itself.
I believe in the sacredness of the human body, this transient dwelling place of a living soul, And so I deem it the duty of every man and every woman to keep his or her body beautiful through right thinking and right living.
I believe that the love of man for woman, and the love of woman for man is holy; And that this love in all its promptings is as much an emanation of the Divine Spirit as man's love for God, or the most daring hazards of the human mind.
I believe in salvation through economic, social, and spiritual freedom.
I believe John Ruskin, William Morris, Henry Thoreau, Walt Whitman, and Leo Tolstoy to be Prophets of God, who should rank in mental reach and spiritual insight with Elijah, Hosea, Ezekiel, and Isaiah.
I believe that men are inspired to-day as much as ever men were.
I believe we are now living in Eternity as much as ever we shall.
I believe that the best way to prepare for a Future Life is to be kind, live one day at a time, and do the work you can do best, doing it as well as you can.
I believe we should remember the Week-day, to keep it holy.
I believe there is no devil but fear.
I believe that no one can harm you but yourself.
I believe in my own divinity — and yours.
I believe that we are all sons of God, and it doth not yet appear what we shall be.
I believe the only way we can reach the Kingdom of Heaven is to have the Kingdom of Heaven in our hearts.
I believe in every man minding his own business.
I believe in sunshine, fresh air, friendship, calm sleep, beautiful thoughts.
I believe in the paradox of success through failure.
I believe in the purifying process of sorrow, and I believe that death is a manifestation of life.
I believe the Universe is planned for good.
I believe it is possible that I shall make other creeds, and change this one, or add to it, from time to time, as new light may come to me.

“That’s the American Dream: to make your life into something you can sell.”
Source: Haunted (2005)

“Do you guys have to sell everything? I'd like to buy the Earth's core.”
Amazon.com interview http://www.amazon.com/gp/feature.html?docId=542410, 2004