Voluntary solitariness is that which is familiar with melancholy, and gently brings on like a syren, a shoeing-horn, or some sphinx to this irrevocable gulf; a primary cause, Piso calls it. Most pleasant it is at first, to such as are melancholy given, to lie in bed whole days, and keep their chambers, to walk alone in some solitary grove, betwixt wood and water, by a brook side, to meditate upon some delightsome and pleasant subject, which shall affect them most; amabilis insania, et mentis gratissimus error: a most incomparable delight it is so to melancholize, and build castles in the air, to go smiling to themselves, acting an infinite variety of parts, which they suppose and strongly imagine they represent, or that they see acted or done: Blandum quidem ab initio, saith Lemnius, to conceive and meditate of such pleasant things, sometimes, "present, past, or to come," as Rhasis speaks. So delightsome these toys are at first, they could spend whole days and nights without sleep, even whole years alone in such contemplations, and fantastical meditations, which are like unto dreams, and they will hardly be drawn from them, or willingly interrupt, so pleasant their vain conceits are, that they hinder their ordinary tasks and necessary business, they cannot address themselves to them, or almost to any study or employment, these fantastical and bewitching thoughts so covertly, so feelingly; so urgently, so continually set upon, creep in, insinuate, possess, overcome, distract, and detain them, they cannot, I say, go about their more necessary business, stave off or extricate themselves, but are ever musing, melancholizing, and carried along, as he (they say) that is led round about a heath with a Puck in the night, they run earnestly on in this labyrinth of anxious and solicitous melancholy meditations, and cannot well or willingly refrain, or easily leave off; winding and unwinding themselves, as so many clocks, and still pleasing their humours, until at last the scene is turned upon a sudden, by some bad object, and they being now habituated to such vain meditations and solitary places, can endure no company, can ruminate of nothing but harsh and distasteful subjects. Fear, sorrow, suspicion, subrusticus pudor, discontent, cares, and weariness of life surprise them in a moment, and they can think of nothing else, continually suspecting no sooner are their eyes open, but this infernal plague of melancholy seizeth on them, and terrifies their souls, representing some dismal object to their minds, which now by no means, no labour, no persuasions they can avoid, hæret lateri lethalis arundo (the arrow of death still remains in the side), they may not be rid of it, they cannot resist.
—The Anatomy of Melancholy, Pt. I., Sec. 2., Mem. 2., Subs. 6.