Mathematics is an obscure field, an abstruse science, complicated and exact; yet so many have attained perfection in it that we might conclude almost anyone who seriously applied himself would achieve a measure of success.
The rule of friendship means there should be mutual sympathy between them, each supplying what the other lacks and trying to benefit the other, always using friendly and sincere words.
A man would have no pleasures in discovering all the beauties of the universe, even in heaven itself, unless he had a partner to whom he might communicate his joys.
Virtue is uniform, conformable to reason, and of unvarying consistency; nothing can be added to it that can make it more than virtue; nothing can be taken from it, and the name of virtue be left.
To disregard what the world thinks of us is not only arrogant but utterly shameless.
[Lat., Negligere quid de se quisque sentiat, non solum arrogantis est, sed etiam omnino dissoluti.]
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.
Do not blame Caesar, blame the people of Rome who have so enthusiastically acclaimed and adored him and rejoiced in their loss of freedom and danced in his path and gave him triumphal processions. Blame the people who hail him when he speaks in the Forum of the 'new, wonderful good society' which shall now be Rome, interpreted to mean 'more money, more ease, more security, more living fatly at the expense of the industrious.'