“Thus a material which cannot last even a little while above ground, endures for a long time when covered with moisture.”
Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book II, Chapter IX, Sec. 10
Context: In swampy places, alder piles driven close together beneath the foundations of buildings take in the water which their own consistence lacks and remain imperishable forever, supporting structures of enormous weight and keeping them from decay. Thus a material which cannot last even a little while above ground, endures for a long time when covered with moisture.
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Vitruvius 203
Roman writer, architect and engineer -80–-15 BCRelated quotes

“No country can long endure if its foundations are not laid deep in the material prosperity”
1900s, The Strenuous Life: Essays and Addresses (1900), The Strenuous Life
Context: No country can long endure if its foundations are not laid deep in the material prosperity which comes from thrift, from business energy and enterprise, from hard, unsparing effort in the fields of industrial activity; but neither was any nation ever yet truly great if it relied upon material prosperity alone. All honor must be paid to the architects of our material prosperity, to the great captains of industry who have built our factories and our railroads, to the strong men who toil for wealth with brain or hand; for great is the debt of the nation to these and their kind. But our debt is yet greater to the men whose highest type is to be found in a statesman like Lincoln, a soldier like Grant. They showed by their lives that they recognized the law of work, the law of strife; they toiled to win a competence for themselves and those dependent upon them; but they recognized that there were yet other and even loftier duties—duties to the nation and duties to the race. We cannot sit huddled within our own borders and avow ourselves merely an assemblage of well-to-do hucksters who care nothing for what happens beyond. Such a policy would defeat even its own end; for as the nations grow to have ever wider and wider interests, and are brought into closer and closer contact, if we are to hold our own in the struggle for naval and commercial supremacy, we must build up our power without our own borders. We must build the Isthmian Canal, and we must grasp the points of vantage which will enable us to have our say in deciding the destiny of the oceans of the East and the West.

"Speaking of Love, No Love, and Other Nuisances" (23 December 1995) in Our Word Is Our Weapon

The Weight of Glory (1949)

The Rubaiyat (1120)

The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.
Variant: In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time.
Source: Leonardo's Notebooks

Source: The Plague of Fantasies (1997), Chapter One: The Seven Veils of Fantasy

Source: The Sense of Wonder (1965)
Context: Those who dwell, as scientists or laymen, among the beauties and mysteries of the earth are never alone or weary of life. Whatever the vexations or concerns of their personal lives, their thoughts can find paths that lead to inner contentment and to renewed excitement in living. Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts.