“Let us endeavour for a moment to disconnect our thinking selves from the mask of humanity; let us imagine ourselves scientific Saturnians, if you will, fairly acquainted with such animals as now inhabit the Earth, and employed in discussing the relations they bear to a new and singular 'erect and featherless biped,' which some enterprising traveller, overcoming the difficulties of space and gravitation, has brought from that distant planet for our inspection, well preserved, may be, in a cask of rum.”

Облетев Землю в корабле-спутнике, я увидел, как прекрасна наша планета. Люди, будем хранить и преумножать эту красоту, а не разрушать её!

Russian phrase, handwritten and signed after his historic spaceflight, photo of facsimile published in Syny goluboi planety 3rd.edition (1981) by L. Lebedev, A. Romanov, and B/ Luk'ianov; the first edition was translated into English as Sons of the Blue Planet (1973) by L. A. Lebedev

Source: Church leaders hail Philippine peace deal http://www.archivioradiovaticana.va/storico/2017/04/07/church_leaders_hail_philippine_peace_deal/en-1304176 (2017)

The Humanist Frame (1961) p. 18 <!--"The Evolutionary Vision" (1960) p. 252 -->
Context: In the evolutionary pattern of thought, there is neither need nor room for the supernatural. The earth was not created; it evolved. So did all the animals and plants that inhabit it, including our human selves, mind and soul as well as brain and body. So did religion.

The New Art of Living (1986), p. 13

1963, UN speech
Context: Two years ago I told this body that the United States had proposed, and was willing to sign, a limited test ban treaty. Today that treaty has been signed. It will not put an end to war. It will not remove basic conflicts. It will not secure freedom for all. But it can be a lever, and Archimedes, in explaining the principles of the lever, was said to have declared to his friends: "Give me a place where I can stand — and I shall move the world." My fellow inhabitants of this planet: Let us take our stand here in this Assembly of nations. And let us see if we, in our own time, can move the world to a just and lasting peace.

Diogenes Laërtius, vi. 40
Quoted by Diogenes Laërtius

Source: Vegetarianism and Occultism (1913), p. 40

Preface
Variant: Paraphrased variant: The difficulty lies not so much in developing new ideas as in escaping from old ones.
Source: The General Theory of Employment, Interest and Money (1936)