Men commonly think according to their inclinations, speak according to their learning and imbibed opinions, but generally act according to custom.
Custom has furnished the only basis which ethics have ever had, and there is no conceivable human action which custom has not at one time justified and at another condemned.
Custom is the principle magistrate of man’s life.
The despotism of custom is everywhere a hindrance to human advancement.
What custom hath endeared We part with sadly, though we prize it not.
Custom is a second nature, and no less powerful.
Custom governs the world; it is the tyrant of our feelings and our manners and rules the world with the hand of a despot.
We are more sensible of what is done against custom than against nature.
There is no tyrant like custom, and no freedom where its edicts are not resisted.
But to my mind, though I am native here And to the manner born, it is a custom more honored in the breach than the observance. (Hamlet)