Quotes about Logic

Reason is free from hatred, has no desire to harm anyone or anything, and will never direct you to do evil. Reason works to the benefit of all things.

Have you reason? 'I have.' Then why not use it? If reason does its part, what more would you ask?

God is a logical, rational being, though he does not necessarily conform to the laws of any human system of logic. The laws of logic are an aspect of his own character. Being logical is his nature and his pleasure. So the fact that he cannot be illogical is not a weakness. It may not be fairly described as a lack of power. Indeed it is a mark of his great power that he always acts and thinks consistently, that he can never be pushed into the inconsistencies that plague human life.

The philosopher must argue for sense experience by appealing to sense experience. What choice does he have? If he appeals to something else as his final authority, he is simply being inconsistent. But this is the case with any basic commitment. When we are arguing on behalf of an absolute authority, then our final appeal must be to that authority and to no other. A proof of the primacy of reason must appeal to reason; a proof of the necessity of logic must appeal to logic;

Like all Holmes's reasoning the thing seemed simplicity itself when it was once explained.

Contradictions do not exist. Whenever you think that you are facing a contradiction, check your premises. You will find that one of them is wrong.

He never does a proper thing without giving an improper reason for it.

In the main, and from the beginning of time, mysticism has kept men sane. The thing that has driven them mad was logic.

There are, then, these three means of effecting persuasion. The man who is to be in command of them must, it is clear, be able (1) to reason logically, (2) to understand human character and goodness in their various forms, and (3) to understand the emotions-that is, to name them and

Dialectic as a whole, or of one of its parts, to consider every kind of syllogism in a similar manner, it is clear that he who is most capable of examining the matter and forms of a syllogism will be in the highest degree a master of rhetorical argument

rhetoric was to be surveyed from the standpoint of philosophy.

The law is reason unaffected by desire.