Thucydides: Most

“they possess most gold and silver, by which war, like everything else, flourishes.”

Thucydides History of the Peloponnesian War

Book VI, 6.34; "they have abundance of gold and silver, and these make war, like other things, go smoothly" ( trans. http://www.classicpersuasion.org/pw/thucydides/jthucbk6rv2.htm Benjamin Jowett)
History of the Peloponnesian War, Book VI

War

“The fate of those of their neighbours who had already rebelled and had been subdued was no lesson to them; their own prosperity could not dissuade them from affronting danger; but blindly confident in the future, and full of hopes beyond their power though not beyond their ambition, they declared war and made their decision to prefer might to right, their attack being determined not by provocation but by the moment which seemed propitious. The truth is that great good fortune coming suddenly and unexpectedly tends to make a people insolent; in most cases it is safer for mankind to have success in reason than out of reason; and it is easier for them, one may say, to stave off adversity than to preserve prosperity.”

Thucydides History of the Peloponnesian War

Book III, 3.39-[3]
History of the Peloponnesian War, Book III

Fate , War , People , Truth

“On the whole, however, the conclusions I have drawn from the proofs quoted may, I believe, safely be relied on. Assuredly they will not be disturbed either by the lays of a poet displaying the exaggeration of his craft, or by the compositions of the chroniclers that are attractive at truth's expense; the subjects they treat of being out of the reach of evidence, and time having robbed most of them of historical value by enthroning them in the region of legend.”

Thucydides History of the Peloponnesian War

Book I, 21-[1]
History of the Peloponnesian War, Book I

Truth , Quotes , Time

“The wide difference between the two characters, the slowness and want of energy of the Spartans as contrasted with the dash and enterprise of their opponents, proved of the greatest service, especially to a maritime empire like Athens. Indeed this was shown by the Syracusans, who were most like the Athenians in character, and also most successful in combating them.”

Thucydides History of the Peloponnesian War

Book VIII, 8.96-[5]
History of the Peloponnesian War, Book VIII

Success

“But what most oppressed them was that they had two wars at once, and has thus reached a pitch of frenzy which no one would have believed possible if he had heard of it before it had come to pass.”

Thucydides History of the Peloponnesian War

Book VII, 7.28-[3]
History of the Peloponnesian War, Book VII

War

“Let him remember that many before now have tried to chastise a wrongdoer, and failing to punish their enemy have not even saved themselves; while many who have trusted in force to gain an advantage, instead of gaining anything more, have been doomed to lose what they had. Vengeance is not necessarily successful because wrong has been done, or strength sure because it is confident; but the incalculable element in the future exercises the widest influence, and is the most treacherous, and yet in fact the most useful of all things, as it frightens us all equally, and thus makes us consider before attacking each other.”

Thucydides History of the Peloponnesian War

Book IV, 4.62-[3]-[4]
History of the Peloponnesian War, Book IV

Exercises , Confidence , Success , Future

“the Thracian people, like the bloodiest of the barbarians, being ever most murderous when it has nothing to fear.”

Thucydides History of the Peloponnesian War

Book VII, 7.29-[4]
History of the Peloponnesian War, Book VII

People , Fear

“But the prize for courage will surely be awarded most justly to those who best know the difference between hardship and pleasure and yet are never tempted to shrink from danger.”

Thucydides History of the Peloponnesian War

Book II, 2.40-[3]
History of the Peloponnesian War, Book II

Pleasure , Courage

“I think the two things most opposed to good counsel are haste and passion; haste usually goes hand in hand with folly, passion with coarseness and narrowness of mind.”

Thucydides History of the Peloponnesian War

Book III, 3.42-[1] (Speech of Diodotus..).
History of the Peloponnesian War, Book III

Thinking , Passion

“The real cause I consider to be the one which was formerly most kept out of sight. The growth of the power of Athens, and the alarm which this inspired the Lacedaemon, made war inevitable.”

Thucydides History of the Peloponnesian War

Book I, 1.23-[6]. (See: Thucydides Trap https://en.wikipedia.org/wiki/Thucydides%20Trap)
History of the Peloponnesian War, Book I

War