It cannot be denied that the possession of a dominant idea, one that may be said to exclude all others, must confer considerable power on the poet, or "interpreter of life;" and in the degree that the idea is mysterious, and difficult of definition or control, will be the extent of this power and its conspicuousness in the poem. And this is entirely legitimate, so long as the poet himself has not the least doubt as to the value of his idea; and there are many admirable poets who have never hesitated, paused, or doubted. Thus it is that we find the idea of heroic duty filling so enormous a space in the tragedies of Corneille, that of absolute faith in the dramas of Calderon, that of the tyranny of destiny in the works of Sophocles. 10 Of these three ideas, that of heroic duty is the most human and the least mysterious; and although far more restricted to-day than at the time of Corneille--for there are few such duties which it would not now be reasonable, and even heroic, perhaps, to call into question, and it becomes ever more and more difficult to find one that is truly heroic--conditions may still be imagined under which recourse thereto may be legitimate in the poet. But will he discover in faith--to-day no more than a shadowy memory to the most fervent believer--that inspiration and strength, by whose aid Corneille was able to depict the God of the Christians as the august, omnipresent actor of his dramas, invisible but untiringly active, and sovereign always? Or is it possible still for a reasonable being, whose eyes rest calmly on the life about him, to believe in the tyranny of fate; of that sluggish, unswerving, preordained, inscrutable force which urges a given man, or family, by given ways to a given disaster or death? For though it be true that our life is subject to many an unknown force, we at least are aware that these forces would seem to be blind, indifferent, unconscious, and that their most insidious attacks may be in some measure averted by the wisest among us. Can we still be allowed, then, to believe that the universe holds a power so idle, so wretched, as to concern itself solely in saddening, frustrating, and terrifying the projects and schemes of man?