When the looms spin by themselves, we'll have no need for slaves.

For well-being and health, again, the homestead should be airy in summer, and sunny in winter. A homestead possessing these qualities would be longer than it is deep; and its main front would face the south.

It is the mark of an educated mind to rest satisfied with the degree of precision which the nature of the subject admits and not to seek exactness where only an approximation is possible.

Our account does not rob the mathematicians of their science... In point of fact they do not need the infinite and do not use it.

It is evident that the state is a creation of nature, and that man is by nature a political animal.

And so long as they were at war, their power was preserved, but when they had attained empire they fell, for of the arts of peace they knew nothing, and had never engaged in any employment higher than war.

We should venture on the study of every kind of animal without distaste; for each and all will reveal to us something natural and something beautiful.