Full Idea
He that should be modest and tractable, and perform all the promises, in such time and place where no man else should do so, should but make himself a prey to others.
Gist of Idea
Someone who keeps all his contracts when others are breaking them is making himself a prey to others
Source
Thomas Hobbes (Leviathan [1651], 1.15)
Book Reference
Hobbes,Thomas: 'Leviathan', ed/tr. Macpherson,C.B. [Penguin 1981], p.215