_Unconsciousness and Instinctiveness._--The coincidence of genius and insanity enables us to understand the astonishing unconsciousness, instantaneousness and intermittence of the creations of genius, whence its great resemblance to epilepsy, the importance of which we shall see later, and whence also a distinction between genius and talent. “Talent,” says Jürgen-Meyer,[47] “knows itself; it knows how and why it has reached a given theory; it is not so with genius, which is ignorant of the how and the why. Nothing is so involuntary as the conception of genius.” “One of the characters of genius,” writes Hagen, “is irresistible impulsion. As instinct compels the animal to accomplish certain acts, even at the risk of life, so genius, when it is dominated by an idea is incapable of abandoning itself to any other thought. Napoleon and Alexander conquered, not from love of glory, but in obedience to an all-powerful instinct; so scientific genius has no rest; its activity may appear to be the result of a voluntary effort, but it is not so. Genius creates, not because it wishes to, but because it must create.” And Paul Richter writes: “The man of genius is in many respects a real somnambulist. In his lucid dream he sees farther than when awake, and reaches the heights of truth; when the world of imagination is taken away from him he is suddenly precipitated into reality.”[48] Haydn attributed the conception of the _Creation_ to a mysterious grace from on high: “When my work does not advance,” he said, “I retire into the oratory with my rosary and say an _Ave_; immediately ideas come to me.” When our Milli produces, almost without knowing it, one of her marvellous poems, she is agitated, cries, sings, takes long walks, and almost becomes the victim of an epileptic attack. Many men of genius who have studied themselves, and who have spoken of their inspiration, have described it as a sweet and seductive fever, during which their thought has become rapidly and involuntarily fruitful, and has burst forth like the flame of a lighted torch. Such is the thought that Dante has engraved in three wonderful lines:-- “_I’ mi son un che, quando_ _Amore spira, noto ed in quel modo_ _Che detta dentro vo significando._”[49]