This is a biographical book. To Johnson, whose supreme enjoyment was the exercise of his reason, the disturbance or obscuration of that faculty was the evil most to be dreaded. Insanity, therefore, was the object of his most dismal apprehension; and he fancied himself seized by it, or approaching to it, at the very time when he was giving proofs of a more than ordinary soundness and vigour of judgement. That his own diseased imagination should have so far deceived him, is strange; but it is stranger still that some of his friends should have given credit to his groundless opinion, when they had such undoubted proofs that it was totally fallacious; though it is by no means surprising that those who wish to depreciate him, should, since his death, have laid hold of this circumstance, and insisted upon it with very unfair.
