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A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murderer is less to fear. The traitor is the plague.
For if that last day does not occasion an entire extinction, but a change of abode only, what can be more desirable And if it, on the other hand, destroys and absolutely puts an end to us, what can be preferable to having a deep sleep fall on us in the midst of the fatigues of life and, being thus overtaken, to sleep to eternity
To be ignorant of what happened before you were born is to be ever a child. For what is man's lifetime unless the memory of past events is woven with those of earlier times
When you wish to instruct, be brief that men's minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.
. . . for until that God who rules all the region of the sky. . . has freed you from the fetters of your body, you cannot gain admission here. Men were created with the understanding that they were to look after that sphere called Earth, which you see in the middle of the temple. Minds have been given to them out of the eternal fires you call fixed stars and planets, those spherical solids which, quickened with divine minds, journey through their circuits and orbits with amazing speed....
For how many things, which for our own sake we should never do, do we perform for the sake of our friends.
Friendship improves happiness and abates misery, by the doubling of our joy and the dividing of our grief.
Natural ability without education has more often raised a man to glory and virtue than education without natural ability.
Not to know what has been transacted in former times is to be always a child. If no use is made of the labors of past ages, the world must remain always in the infancy of knowledge.
Quod est ante pedes nemo spectat: coeli scrutantur plagas. (No one sees what is before his feet: we all gaze at the stars.)
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