Seeing that the Senses cannot decide our dispute, being themselves full of uncertainty, we must have recourse to Reason; there is no reason but must be built upon another reason: so here we are retreating backwards to infinity.

There is a certain amount of purpose, acquiescence, and satisfaction in nursing one's melancholy.

Meditation is a rich and powerful method of study for anyone who knows how to examine his mind.

I enter into discussion and argument with great freedom and ease, inasmuch as opinion finds me in a bad soil to penetrate and take deep root in. No propositions astonish me, no belief offends me, whatever contrast it offers to my own. There is no fancy so frivolous and so extravagant that it does not seem to me quite suitable to the production of the human mind.

We have the pleasures suitable to our lot; let us not usurp those of greatness. Ours are more natural and all the more solid and sure for being humbler. Since we will not do so out of conscience, at least out of ambition let us reject ambition.

Oh, what a valiant faculty is hope, that in a mortal subject, and in a moment, makes nothing of usurping infinity, immensity, eternity, and of supplying its masters indigence, at its pleasure, with all things he can imagine or desire!

Valor is strength, not of legs and arms, but of heart and soul; it consists not in the worth of our horse or our weapons, but in our own.