Reason is the wise man’s guide, example the fool’s.

Why does man kill? He kills for food. And not only food: frequently there must be a beverage.

A man has free choice to the extent that he is rational.

Most men seem to live according to sense rather than reason.

O reason, reason, abstract phantom of the waking state, I had already expelled you from my dreams, now I have reached a point where those dreams are about to become fused with apparent realities: now there is only room here for myself.

There are strange flowers of reason to match each error of the senses.

Many are destined to reason wrongly; others, not to reason at all; and others, to persecute those who do reason.

The true triumph of reason is that it enables us to get along with those who do not possess it.

As if reasoning were any kind of writing or talking which tends to convince people that some doctrine or measure is true and right.

Reason transformed into prejudice is the worst form of prejudice, because reason is the only instrument for liberation from prejudice.