Friendship is the only thing in the world concerning the usefulness of which all mankind are agreed.
Marcus Tullius CiceroRead
The mind becomes accustomed to things by the habitual sight of them, and neither wonders nor inquires about the reasons for things it sees all the time.
Interpretation
Familiarity can lead to complacency and a lack of inquiry into the nature of things.
Cicero's quote highlights how repeated exposure to certain sights or experiences can dull our sense of curiosity and wonder. When we become accustomed to something, we often stop questioning its existence or understanding its significance, which reinforces a passive acceptance of our surroundings rather than an active engagement with the world.
In practice
A teacher might use this quote to encourage students to question the information they take for granted.
Friendship is the only thing in the world concerning the usefulness of which all mankind are agreed.
Those wars are unjust which are undertaken without provocation. For only a war waged for revenge or defence can actually be just.
Orators are most vehement when their cause is weak.
Nothing contributes to the entertainment of the reader more, than the change of times and the vicissitudes of fortune.
No one has the right to be sorry for himself for a misfortune that strikes everyone.
Advice in old age is foolish; for what can be more absurd than to increase our provisions for the road the nearer we approach to our journey's end.
Capitalism will behave antisocially if it is profitable for it to do so, and that can now mean human devastation on an unimaginable scale. What used to be apocalyptic fantasy is today no more than sober realism.
I say no body of men are fit to make Presidents, judges and generals, unless they themselves supply the best specimens of the same; and that supplying one or two such specimens illuminates the whole body for a thousand years.
Boredom is just the reverse side of fascination.
Thus we never see the true state of our condition till it is illustrated to us by its contraries, nor know how to value what we enjoy, but by the want of it.
A force as of madness in the hands of reason has done all that was ever done in the world.
Most of us, if we're not careful, tend to dehumanize the enemy.
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