“All land belongs to the Muslims, because it belongs to their God.”

Source: A Sand County Almanac, 1949, Foreword, p. viii.
Context: Conservation is getting nowhere because it is incompatible with our Abrahamic concept of land. We abuse land because we regard it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect. There is no other way for land to survive the impact of mechanized man, nor for us to reap from it the aesthetic harvest it is capable, under science, of contributing to culture.

Interlude on the Plains, p. 200
My Early Years (1968)

La tierra es de quien la trabaja con sus manos.
Quoted as a slogan of the revolutionaries in Shirt-Sleeve Diplomat (1947) Vol. 5, p. 199, by Josephus Daniels, and specifically attributed to Zapata by Ángel Zúñiga in 1998, as quoted in Mexican Social Movements and the Transition to Democracy (2005), by John Stolle-McAllister

The real author seems to be Pierre Albert-Birot https://books.google.com/books?id=3Ul51CwjUOcC&pg=PA290&dq=%22the+curved+line+that+belongs+let%27s+say+to+God+and+the+straight+line+that+belongs+to+man%22&hl=de&sa=X&redir_esc=y#v=onepage&q=%22the%20curved%20line%20that%20belongs%20let%27s%20say%20to%20God%20and%20the%20straight%20line%20that%20belongs%20to%20man%22&f=false.
Attributed

Source: A Sand County Almanac, 1949, Foreword, p. viii.

"What Social Classes Owe to Each Other", 1883, Ch III http://oll.libertyfund.org/titles/sumner-what-social-classes-owe-to-each-other.

Source: Letter to a Child Never Born

Ai Weiwei Twitter feed: @AiWW (9:10 a.m. May 21, 2010)
2010-, Twitter feeds, 2010-12

Written statement (1920), as quoted in .
Context: Under no circumstances must we touch land belonging to fellahs or worked by them. Only if a fellah leaves his place of settlement, should we offer to buy his land, at an appropriate price.