Of course poets have morals and manners of their own, and custom is no argument with them. – Thomas Hardy
Customs form us all, our thoughts, our morals, our most fixed beliefs; are consequences of our place of birth. – Aaron Hill
The despotism of custom is everywhere the standing hindrance to human advancement. – John Stuart Mill
Often, the less there is to justify a traditional custom, the harder it is to get rid of it. – Mark Twain