Dracula

"your simile of the tiger good, for me, and I shall adopt him. Your maneater, as they of India call the tiger who has once tasted blood of the human, care no more for the other prey, but prowl unceasing till he get him. This that we hunt from our village is a tiger, too, a maneater, and he never cease to prowl. Nay, in himself he is not one to retire and stay afar. In his life, his living life, he go over the Turkey frontier and attack his enemy on his own ground. He be beaten back, but did he stay? No! He come again, and again, and again. Look at his persistence and endurance. With the child-brain that was to him he have long since conceive the idea of coming to a great city. What does he do? He find out the place of all the world most of promise for him. Then he deliberately set himself down to prepare for the task. He find in patience just how is his strength, and what are his powers. He study new tongues. He learn new social life, new environment of old ways, the politics, the law, the finance, the science, the habit of a new land and a new people who have come to be since he was. His glimpse that he have had, whet his appetite only and enkeen his desire. Nay, it help him to grow as to his brain. For it all prove to him how right he was at the first in his surmises. He have done this alone, all alone! From a ruin tomb in a forgotten land. What more may he not do when the greater world of thought is open to him. He that can smile at death, as we know him. Who can flourish in the midst of diseases that kill off whole peoples. Oh! If such an one was to come from God, and not the Devil, what a force for good might he not be in this old world of ours."

Dracula, Bram Stoker, Chapter 24