“The growth of the power of Athens, and the alarm which this inspired in Sparta, made war inevitable.”
Book I, 1.23-[6].
History of the Peloponnesian War, Book I
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Thucydides 76
Greek historian and Athenian generalRelated quotes

“Growth is exciting; growth is dynamic and alarming.”
Twelve Days (1928) p. 9; part of this appears to have also become paraphrased in the form:
Context: It is necessary to write, if the days are not to slip emptily by. How else, indeed, to clap the net over the butterfly of the moment? for the moment passes, it is forgotten; the mood is gone; life itself is gone. That is where the writer scores over his fellows: he catches the changes of his mind on the hop. Growth is exciting; growth is dynamic and alarming. Growth of the soul, growth of the mind; how the observation of last year seems childish, superficial; how this year — even this week — even with this new phrase — it seems to us that we have grown to a new maturity. It may be a fallacious persuasion, but at least it is stimulating, and so long as it persists, one does not stagnate.
I look back as through a telescope, and see, in the little bright circle of the glass, moving flocks and ruined cities.

“As long as there are sovereign nations possessing great power, war is inevitable.”

“Change is inevitable. Growth is optional.”

2000s, Where the Right Went Wrong (2004)

“The war has made us a nation of great power and intelligence.”
1880s, Personal Memoirs of General U. S. Grant (1885)
Context: The war has made us a nation of great power and intelligence. We have but little to do to preserve peace, happiness and prosperity at home, and the respect of other nations. Our experience ought to teach us the necessity of the first; our power secures the latter.

“Improvement demands a commitment to growth long after the mood in which it was made has passed.”
Book Sometimes you win Sometimes you Learn