He claimed for preachers chosen by local congregations the privileges and powers of the apostolic companions of Christ, and in place of "sweet reasonableness," he applied the methods, quite alien to the Founder of Christianity, of the "Sons of Thunder." All controversialists then relied on isolated and inappropriate scriptural texts, and Biblical analogies which were not analogous; but Knox employed these things, with perhaps unusual inconsistency, in varying circumstances.

His "History" is not more scrupulous than that of other partisans in an exciting contest, and examples of his taste for personal scandal are not scarce..