„Upon the earth are animals and men, some in a middle region, others dwelling about the air as we dwell about the sea; others in islands which the air flows round, near the continent; and in a word, the air is used by them as the water and the sea are by us, and the ether is to them as the air is to us. Moreover, the temperament of their seasons is such that they have no disease, and live much longer than we do, and have sight and hearing and smell, and all the other senses, in far greater perfection, in the same degree that air is purer than water or the ether than air. Also they have temples and sacred places in which the gods really dwell, and they hear their voices and receive their answers and are conscious of them and hold converse with them, and they see the sun, moon, and stars as they really are, and their other blessedness is of a piece with this.“

— Socrates

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„I've fought with men and gods, I've weighed them well and foundthe sea more firm than earth, the air more firm than sea,and man's impalpable soul still yet more firm than air!“
— Nikos Kazantzakis
„Even a really bad creator would at least have started with Earth, Air, Fire, Water and Surprise.“
— Terry Pratchett
„Live in the sunshine, swim the sea, drink the wild air.“
— Ralph Waldo Emerson
„Water and air, the two essential fluids on which all life depends, have become global garbage cans.“
— Jacques-Yves Cousteau
„When earth meets with fire and is dissolved by the keenness of it, it would drift about, whether it were dissolved in fire itself, or in some mass of air or water, until the parts of it meeting and again being united became earth once more; for it never could pass into any other kind. But when water is divided by fire or by air, it may be formed again and become one particle of fire and two of air: and the divisions of air may become for every particle broken up two particles of fire. And again when fire is caught in air or in waters or in earth, a little in a great bulk, moving amid a rushing body, and contending with it is vanquished and broken up, two particles of fire combine into one figure of air: and when air is vanquished and broken small, from two whole and one half particle one whole figure of water will be composed. Let us also reckon it once again thus: when any of the other kinds is intercepted in fire and is divided by it through the sharpness of its angles and its sides, if it forms into the shape of fire, it at once ceases from being divided…“
— Platón