What we take to be our strongest tower of delight, only stands at the caprice of the minutest event — the falling of a leaf, the hearing of a voice, … - Herman Melville

Call me Ishmael. Some years ago - never mind how long precisely - having little or no money in my purse, and nothing particular to interest me on shore, I thought I would sail about a little and see the watery part of the world. It is a way I have of driving off the spleen, and regulating the circulation. Whenever I find myself growing grim about the mouth; whenever it is a damp, drizzly November in my soul; whenever I find myself involuntarily pausing before coffin warehouses, and bringing up the rear of every funeral I meet; and especially whenever my hypos get such an upper hand of me, that it requires a strong moral principle to prevent me from deliberately stepping into the street, and methodically knocking people's hats off - then, I account it high time to get to sea as soon as I can. This is my substitute for pistol and ball. With a philosophical flourish Cato throws himself upon his sword; I quietly take to the ship.

The Nantucketer, he alone resides and riots on the sea; he alone, in Bible language, goes down to it in ships; to and fro ploughing it as his own special plantation. There is his home; there lies his business, which a Noah's flood would not interrupt, though it overwhelmed all the millions in China. He lives on the sea, as prairie cocks in the prairie; he hides among the waves, he climbs them as chamois hunters climb the Alps. For years he knows not the land; so that when he comes to it at last, it smells like another world, more strangely than the moon would to an Earthman. With the landless gull, that at sunset folds her wings and is rocked to sleep between billows; so at nightfall the Nantucketer, out of sight of land, furls his sails, and lays him to his rest, while under his very pillow rush herds of walruses and whales.

"I will have no man in my boat," said Starbuck, "who is not afraid of a whale." By this, he seemed to mean, not only that the most reliable and useful courage was that which arises from the fair estimation of the encountered peril, but that an utterly fearless man is a far more dangerous comrade than a coward.
(moby dick chap 26 p112)