"What custom hath endeared
We part with sadly, though we prize it not."
- JOANNA BAILLIE, Basil

"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." - JOSEPH WOOD KRUTCH, The Modern Temper

"We are all convention; convention carries us away, and we neglect the substance of things. . .
We dare not call our parts by their right names, but are not afraid to use them for every sort of debauchery."
- MICHEL DE MONTAIGNE, Essays

"We are more sensible of what is done against custom than against nature." - PLUTARCH, Morals

"But to my mind, though I am native here
And to the manner born, it is a custom
More honor'd in the breach than the observance."
- SHAKESPEARE, Hamlet