| Logic: The art of thinking and reasoning in strict accordance with the limitations and incapacities of the human misunderstanding. |
| Logic is neither a science nor an art, but a dodge. |
| Logic is one thing and commonsense another. |
| Logic is the anatomy of thought. |
| It is so easy to convince others; it is so difficult to convince oneself. |
| It is useless to attempt to reason a man out of a thing he was never reasoned into. |
| Everything has to come to an end, sometime. |
| It is always easy to be logical. It is almost impossible to be logical to the bitter end. |
| When it is not in our power to determine what is true, we ought to follow what is most probable. |
| What does the brain matter compared with the heart? |