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 one thing and commonsense another. – Elbert Hubbard, The Note Book, 1927

A wise man is not governed by others, nor does he try to govern them; he prefers that reason alone prevail. – La Bruyère, Characters, 1688

I cannot tell by what logic we call a toad, a bear, or an elephant ugly; they being created in those outward shapes and figures which best express the actions of their inward forms. – Sir Thomas Browne