I have always thought of sophistication as rather a feeble substitute for decadence.

A public-opinion poll is no substitute for thought.

Food for thought is no substitute for the real thing.

Furious activity is no substitute for analytical thought.

Asking a working writer what he thinks about critics is like asking a lamppost how it feels about dogs.

It's possible to disagree with someone about the ethics of non-violence without wanting to kick his face in.