Vice may be learnt, even without a teacher.

It's a vice to trust all, and equally a vice to trust none

Those vices [luxury and neglect of decent manners] are vices of men, not of the times. [Lat., Hominum sunt ista [vitia], non temporum.

I am a Ford, not a Lincoln." (On becoming vice president, December 1973)

There will be vice as long as there are men.

A vice is a failure of desire.