1. "And in its sky was such a sun as no opium eater could ever have imagined in his wildest dreams. Too hot to be white, it was a searing ghost at the frontiers of the ultraviolet, burning its planets with radiations which would be instantly lethal to all earthly forms of life. For millions of kilometers around extended great veils of gas and dust, fluorescing in countless colors as the blasts of ultraviolet tore through them. It was a star against which Earth’s pale sun would have been as feeble as a glowworm at noon."
- Arthur C. Clarke, Childhood's End
2. "Mad! Quite mad!' said Stalky to the visitors, as one exhibiting strange beasts. 'Beetle reads an ass called Brownin', and M'Turk reads an ass called Ruskin; and-' 'Ruskin isn't an ass,' said M'Turk. 'He's almost as good as the Opium-Eater. He says we're "children of noble races, trained by surrounding art." That means me, and the way I decorated the study when you two badgers would have stuck up brackets and Christmas cards. Child of a noble race, trained by surrounding art, stop reading or I'll shove a pilchard down your neck!"
- Rudyard Kipling, The Complete Stalky and Co.
3. "The opium-eater loses none of his moral sensibilities or aspirations. He wishes and longs as earnestly as ever to realize what he believes possible, and feels to be exacted by duty; but his intellectual apprehension of what is possible infinitely outruns his power, not of execution only, but even of power to attempt. He lies under the weight of incubus and nightmare; he lies in sight of all that he would fain perform, just as a man forcibly confined to his bed by the mortal languor of a relaxing disease, who is compelled to witness injury or outrage offered to some object of his tenderest love: he curses the spells which chain him down from motion; he would lay down his life if he might but get up and walk; but he is powerless as an infant, and cannot even attempt to rise. I"
- Thomas de Quincey, Confessions of an English Opium-Eater