Quotes about Logic

Rhetoric uses syllogisms and other suasions to bring about a change of heart and of mind.

The formula "two and two make five" is not without its attractions.

The poet only asks to get his head into the heavens. It is the logician who seeks to get the heavens into his head. And it it his head that splits.

Irish rock star Bono has said, "Grace defies reason and logic. Love interrupts, if you like, the consequences of your actions, which in my case is very good news indeed, because I've done a lot of stupid stuff.

This, in every hour and every issue, is your basic moral choice: thinking or non-thinking, existence or non-existence, A or non-A, entity or zero.

Reason is the most naive of all superstitions.

Reason functions by integrating perceptual data into concepts.

I want you to observe...that those who cry the loudest about their disillusionment, about the failure of virtue, the futility of reason, the impotence of logic—are those who have achieved the full, exact, logical result of the ideas they preached, so mercilessly logical that they dare not identify it.

From this simplest necessity to the highest religious abstraction, from the wheel to the skyscraper, everything we are and everything we have comes from a single attribute of man—the function of his reasoning mind.

God is non-man, heaven is non-earth, soul is non-body, virtue is non-profit. A is non-A, perception is non-sensory, knowledge is non-reason. Their definitions are not acts of defining, but of wiping out.

I'm an old-fashioned guy. I believe in the Enlightenment, and reason, and logic, and you know, facts.

Is it logical that two people can disagree and that both can be right? It's not logical: it's psychological. And it's very real.