在民法中作为帝王原则的诚信原则不是一开始就规定在各国的民法典中的,它的确定经过了一个漫长的历史过程。早在罗马帝国时期,商品经济的发展就促进了债法的发展。那时候的立法者就已经发现,无论法律和当事人之间的契约规定的多么严密,也很难把每一种情况都规定下来,只要当事人心存恶 The principle of good faith, which is the principle of imperialism in civil law, was not stipulated in the civil code of the nation from the very beginning. Its determination lasted a long historical process. As early as the Roman Empire, the development of commodity economy promoted the development of debt law. At that time, the legislators have found that no matter how strict the contract between the law and the parties, it is difficult to stipulate every situation as long as the parties cherish the evil