For a professor must have a theory, as a dog must have...

For a professor must have a theory, as a dog must have fleas.

Prejudices: First Series, Criticism of Criticism of Criticism (p. 12)

H. L. Mencken Quotes

For a professor must have a theory, as a dog must have fleas.

For a professor must have a theory, as a dog must have fleas.

For a professor must have a theory, as a dog must have fleas.

For a professor must have a theory, as a dog must have fleas.