The key to the plot is given in the Prologue in Heaven. The devil, in the character of Mephistopheles, asks permission to tempt Faust; he boasts his ability to get entire possession of his soul and drag him down to hell. The Lord grants the permission, and prophesies the failure of the attempt:-- "Be it allowed! Draw this spirit from its Source if you can lay hold of him; bear him with you on your downward path, and stand ashamed when you are forced to confess that a good man in his dark strivings has a consciousness of the right way." Here we have a hint of the author's design. He does not intend that the devil shall succeed; he does not mean to adopt the conclusion of the legend and send Faust to hell. He had the penetration to see, and he meant to show, that the notion implied in the old popular superstition of selling one's soul to the devil--the notion that evil can obtain the entire and final possession of the soul--is a fallacy; that the soul is not man's to dispose of, and cannot be so traded away. We are the soul's, not the soul ours. Evil is self-limited; the good in man must finally prevail. So long as he strives he is not lost; Heaven will come to the aid of his better nature. This is the doctrine, the philosophy, of "Faust." In the First Part, stung by disappointment in his search of knowledge, by failure to lay hold of the superhuman, and urged on by his baser propensities personified in Mephistopheles, Faust abandons himself to sensual pleasure,--seduces innocence, burdens his soul with heavy guilt, and seems to be entirely given over to evil. This Part ends with Mephistopheles' imperious call,--"Her zu mir,"--as if secure of his victim. Before the appearance of the Second Part, the reader was at liberty to accept that conclusion. But in the Second Part Faust gradually wakes from the intoxication of passion, outgrows the dominion of appetite, plans great and useful works, whereby Mephistopheles loses more and more his hold of him; and after his death is baffled in his attempt to appropriate Faust's immortal part, to which the heavenly Powers assert their right.... The character of Margaret is unique; its duplicate is not to be found in all the picture galleries of fiction. Shakspeare, in the wide range of his feminine _personnel_, has no portrait like this. A girl of low birth and vulgar circumstance, imbued with the ideas and habits of her class, speaking the language of that class from which she never for a moment deviates into finer phrase, takes on, through the magic handling of the poet, an ideal beauty. Externally common and prosaic in all her ways, she is yet thoroughly poetic, transfigured in our conception by her perfect love. To that love, unreasoning, unsuspecting,--to the excess of that which in itself is no fault, but beautiful and good,--her fall and ruin are due. Her story is the tragedy of her sex in all time. As Schlegel said of the "Prometheus Bound,"--"It is not a single tragedy, but tragedy itself." ...