Thomas Hobbes

“ The former is free from controversies and dispute, because it consisteth in comparing figures and motion only; in which things truth and the interest of men, oppose not each other. But in the later there is nothing not disputable, because it compareth men, and meddleth with their right and profit; in which as oft as reason is against a man, so oft will a man be against reason. ”

“ And from hence it comes, that they who have written of justice and policy in general do all invade each other, and themselves, with contradiction. To reduce this doctrine to the rules and infallibility of reason, there is no way, but first, to put such principles down for a foundation, as passion not mistrusting may not seek to displace: And afterward to build thereon the truth of cases in the law of nature (which hitherto have been built in the air) by degrees, till the whole be inexpugnable. ”