From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. – Sir Arthur Conan Doyle

Logic is a large drawer, containing some useful instruments, and many more that are superfluous. A wise man will look into it for two purposes, to avail himself of those instruments that are really useful, and to admire the ingenuity with which those that are not so, are assorted and arranged. – Charles Caleb Colton, Lacon

Reason can wrestle and overthrow terror. – Euripides