It will be found that the principle underlying Carlyle's choice of historical themes was similar. He was bound to reveal _himself_; but Carlyle's _self_ was a particular view of the universe. His subject therefore must illustrate this. He was naturally attracted to the French Revolution. It is the greatest movement of recent history; and Carlyle invariably sought for lessons for the present. It dealt the death-blow to many shams and hypocrisies; and Carlyle waged a life-long war against these. While its creed was the equality of men, no great movement has ever more vividly illustrated their great and inevitable inequality; and Carlyle rejoiced to see the truth assert itself in spite of the prepossessions of a victorious mob, and rejoiced to point to the confirmation of his own favourite doctrine. Again, though Cromwell seems to have been brought to his mind almost by chance, the points of contact between the hero and his historian are sufficiently obvious. Cromwell's strength, his thoroughness, his roughness, his veracity, his piety, all contributed to endear him to Carlyle. The 'Calvinist without the theology' was fundamentally in sympathy with the great English Puritan. His boyhood and early training fitted him, better perhaps than any other training of the nineteenth century could possibly have done, to sympathise with the opinions of the Puritan of the seventeenth. It was the instinct which draws like to like that made him welcome the first suggestion of Cromwell as a subject; just as the same instinct made him afterwards ponder upon Knox as another possible subject.