Tranquility Quotes (8 quotes)
It is from this absolute indifference and tranquility of the mind, that mathematical speculations derive some of their most considerable advantages; because there is nothing to interest the imagination; because the judgment sits free and unbiased to examine the point. All proportions, every arrangement of quantity, is alike to the understanding, because the same truths result to it from all; from greater from lesser, from equality and inequality.
In On the Sublime and Beautiful, Part 3, sect. 2.
Nature intended me for the tranquil pursuits of science, by rendering them my supreme delight. But the enormities of the times in which I have lived, have forced me to take a part in resisting them, and to commit myself on the boisterous ocean of political passions.
Letter to Pierre Samuel Du Pont de Nemours (2 Mar 1809). In Thomas Jefferson and John P. Foley (ed.) The Jeffersonian Cyclopedia (1990), 766.

Neil and Buzz, I am talking to you by telephone from the Oval Office at the White House, and this certainly has to be the most historic telephone call ever made. Because of what you have done, the heavens have become a part of man’s world. As you talk to us from the Sea of Tranquility, it inspires us to redouble our efforts to bring peace and tranquility to Earth.
Speaking to the first astronauts while they were standing on the Moon (20 Jul 1969).
Periods of tranquillity are seldom prolific of creative achievement. Mankind has to be stirred up.
From Dialogue XIX in Alfred North Whitehead and Lucien Price (ed.), Dialogues of Alfred North Whitehead (1954, 1977), 154.
Roger, Tranquility. Be advised there are lots of smiling faces in this room and all over the world. Over.
From the taped recording of Air-to-Ground Transmissions during Apollo 11 moon mission, after the Lunar Module had just landed on the moon surface. Charlie Duke was the designated Communicator at Mission Control. Also in Bob Blaisdell (ed.), Essential Documents of American History: From Reconstruction to the Twenty-First Century (2016), Vol. 2, 329
Roger, Tranquility. We copy you on the ground. You’ve got a bunch of guys about to turn blue. We’re breathing again. Thanks a lot.
From the taped recordings of conversations during the Apollo 11 moon mission, as the Lunar Module touched down on the Moon surface. Charlie Duke was the designated Communicator at Mission Control, replying to: “The Eagle has landed.” Also in Bob Blaisdell (ed.), Essential Documents of American History: From Reconstruction to the Twenty-First Century (2016), Vol. 2, 329.
Roger, we copy. It was beautiful from here, Tranquility. Over.
From the taped recording of Air-to-Ground Transmissions during Apollo 11 moon mission, after the Lunar Module had just landed on the moon surface. Charlie Duke was the designated Communicator at Mission Control. Also in Bob Blaisdell (ed.), Essential Documents of American History: From Reconstruction to the Twenty-First Century (2016), Vol. 2, 329
Tranquility is nothing else than the good ordering of the mind.
Meditations, IV, 3.