Fear and Trembling (original Danish: Frygt og Bæven) is an influential philosophical work by Søren Kierkegaard, published in 1843 under the pseudonym Johannes de silentio (John the Silent).
Not only in the world of commerce but also in the world of ideas our age has arranged a regular clearance-sale. Everything may be had at such absurdedly low prices that very soon the question will arise whether any one cares to bid. Every waiter with a speculative turn who carefully marks the significant progress of modern philosophy, every lecturer in philosophy, every tutor, student, every sticker-and‑quitter of philosophy—they are not content with doubting everything, but "go right on." It might, possibly, be ill‑timed and inopportune to ask them whither they are bound; but it is no doubt polite and modest to take it for granted that they have doubted everything—else it were a curious statement for them to make, that they were proceeding onward. So they have, all of them, completed that preliminary operation and, it would seem, with such ease that they do not think it necessary to waste a word about how they did it. The fact is, not even he who looked anxiously and with a troubled spirit for some little point of information, ever found one, nor any instruction, nor even any little dietetic prescription, as to how one is to accomplish this enormous task. "But did not Descartes proceed in this fashion?" Descartes, indeed! that venerable, humble, honest thinker whose writings surely no one can read without deep emotion—Descartes did what he said, and said what he did. Alas, alas! that is a mighty rare thing in our times! But Descartes, as he says frequently enough, never uttered doubts concerning his faith. . . .
In our times, as was remarked, no one is content with faith, but "goes right on." The question as to whither they are proceeding may be a silly question; whereas it is, a sign of urbanity and culture to assume that every one has faith, to begin with, for else it were a curious statement for them to make, that they are proceeding further. In the olden days it was different. Then, faith was a task for a whole life‑time because it was held that proficiercy in faith was not to be won within a few days or weeks. Hence, when the tried patriarch felt his end approaching, after having fought his battles and preserved his faith, he was still young enough at heart not to have forgotten the fear and trembling which disciplined his youth and which the mature man has under control, but which no one entirely outgrows—except insofar as he succeeds in "going on" as early as possible. The goal which those venerable men reached at last—at that spot every one starts, in our times, in order to "proceed further.". . .