“In swampy places, alder piles driven close together beneath the foundations of buildings”
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

“Too low they build who build beneath the stars.”
Reported in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 206.
Night-Thoughts (1742–1745), Night VIII

Source: Academy Series - Priscilla "Hutch" Hutchins, Cauldron (2007), Chapter 30 (p. 279)

“That love which does not build a foundation on good sense is doomed.”
Source: Atonement

The Forerunner (1920)
Context: You are your own forerunner, and the towers you have builded are but the foundation of your giant-self. And that self too shall be a foundation.
And I too am my own forerunner, for the long shadow stretching before me at sunrise shall gather under my feet at the noon hour. Yet another sunrise shall lay another shadow before me, and that also shall be gathered at another noon.
Always have we been our own forerunners, and always shall we be. And all that we have gathered and shall gather shall be but seeds for fields yet unploughed. We are the fields and the ploughmen, the gatherers and the gathered.
Zend explaining the Spawn of Dagon to Elak
Short fiction, The Spawn Of Dagon (1938)
Context: "They dare'd not invade the palace while the globe shone, for the light-rays would have killed them. … This island-continent would have gone down beneath the sea long ago if I hadn't pitted my magic and my science against that of the children of Dagon. They are masters of the earthquake, and Atlantis rests on none too solid a foundation. Their power is sufficient to sink Atlantis forever beneath the sea. But within that room" — Zend nodded toward the curtain that hid the sea-bred horrors — "in that room there is power far stronger than theirs. I have drawn strength from the stars, and the cosmic sources beyond the universe. You know nothing of my power. It is enough — more than enough — to keep Atlantis steady on its foundation, impregnable against the attacks of Dagon's breed. They have destroyed other lands before Atlantis."

“We build upon the sand, and the older we become, the more unstable this foundation becomes.”