Authors:

... you don't have to wait for someone to treat you bad repeatedly. All it takes is once, and if they get away with it that once, if they know they can treat you like that, then it sets the pattern for the future.

Jane Green (2002). “Bookends: A Novel”, p.188, Broadway Books
... you don't have to wait for someone to treat you bad repeatedly. All it takes is once, and if they get away with it that once, if they know they can treat you like that, then it sets the pattern for the future.