“The dreamers, those who misread the actual state of affairs and act upon their emotions, are often the source of the greatest mistakes in history—the wars that are not thought out, the disasters that are not foreseen”
Source: The 50th Law
Help us to complete the source, original and additional information
Robert Greene 111
American author 1959Related quotes

Session 821, Page 99
The Individual and the Nature of Mass Events, (1981)

Or, selon mon advis, entre toutes les seigneuries du monde, dont j'ay connoissance, où la chose publique est mieux traictée, et où règne moins de violence sur le peuple, et où il n'y a nuls édifices abatus, ni démolis pour guerre, c'est Angleterre; et tombe le sort et le malheur sur ceux qui font la guerre.
Bk. V, ch. 19.
Mémoires

Preface.
A History of Science Vol.1 Ancient Science Through the Golden Age of Greece (1952)
Context: Some men are abstract-minded, and they naturally think first of unity and God, of wholeness, of infinity and other such concepts, while the minds of other men are concrete and they cogitate about health and disease, profit and loss. They invent gadgets and remedies; they are less interested in knowing anything than in applying whatever knowledge... to practical problems... The first are called dreamers; the second kind are recognized as practical and useful. History has often proved the shortsightedness of the practical men and vindicated the "lazy" dreamers; it has also proved that the dreamers are often mistaken.

“The greatest man of action is he who is the greatest, and a life-long, dreamer.”
Education (1902)
Context: He who knows naught of dreaming can, likewise, never attain the heights of power and possibility in persuading the mind to act.
He who dreams not creates not.
For vapor must arise in the air before the rain can fall.
The greatest man of action is he who is the greatest, and a life-long, dreamer. For in him the dreamer is fortified against destruction by a far-seeing eye, a virile mind, a strong will, a robust courage.
And so has perished the kindly dreamer — on the cross or in the garret.
A democracy should not let its dreamers perish. They are its life, its guaranty against decay.
Thus would I expand the sympathies of youth.
Thus would I liberate and discipline all the constructive faculties of the mind and encourage true insight, true expression, real individuality.
Thus would I concentrate the powers of will.
Thus would I shape character.
Thus would I make good citizens.
And thus would I lay the foundations for a generation of real architects — real, because true, men, and dreamers in action.

Source: Omnipotent Government: The Rise of the Total State and Total War (1944), Chapter III: Etatism

Letter to his wife Margaretta (11 June 1863); published in The Life and Letters of George Gordon Meade (1913)