He who thinks and thinks for himself, will always have a claim to thanks; it is no matter whether it be right or wrong, so as it be explicit. If it is right, it will serve as a guide to direct; if wrong, as a beacon to warn.
I don't care whether animals are capable of thinking; all I care about is that they are capable of suffering!
Nature has placed mankind under the government of two sovereign masters, pain and pleasure... they govern us in all we do, in all we say, in all we think: every effort we can make to throw off our subjection, will serve but to demonstrate and confirm it.