"There are indeed, in the present corruption of mankind, many incitements to forsake truth: the need of palliating our own faults and the convenience of imposing on the ignorance or credulity of others so frequently occur; so many immediate evils are to be avoided, and so many present gratifications obtained, by craft and delusion that very few of those who are much entangled in life have spirit and constancy sufficient to support in the steady practice of open veracity."
January 1, 1970
https://en.wikiquote.org/wiki/Credulity