In an exchange with the evolutionary biologist and Marxist J.B.S. Haldane, C.S. Lewis found his motivations under assault. Lewis offered this marvelous reply:

The Professor has his own explanation … he thinks that I am unconsciously motivated by the fact that I “stand to lose by social change.” And indeed it would be hard for me to welcome a change which might well consign me to a concentration camp. I might add that it would likewise be easy for the Professor to welcome a change which might place him in the highest rank of an omnicompetent oligarchy. That is why the motive game is so uninteresting. Each side can go on playing ad nauseam, but when all the mud has been flung every man’s views still remain to be considered on their merits. I decline the motive game and resume the discussion.

As quoted by Peter Wehner at Commentary. Read the whole thing.