Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead.
Consistency is a virtue for trains: what we want from a philosopher is insights, whether he comes by them consistently or not.
Consistency is the last refuge of the unimaginative.
Consistency is the enemy of enterprise, just as symmetry is the enemy of art.
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.
If a person never contradicts himself, it must be that he says nothing.
Consistency requires you to be as ignorant today as you were a year ago.
Of course I'm inconsistent! Only logicians and cretins are consistent!