"My father had taught me to be nice first, because you can always be mean later, but once you've been mean to someone, they won't believe the nice anymore. So be nice, be nice, until it's time to stop being nice, then destroy them."

Next Quote

One of the consequences of such notions as ‘entitlements’ is that people who have contributed nothing to society feel that society owes them something, apparently just for being nice enough to grace us with their presence.

— Thomas Sowell