““From the shape of a cloud I know that a man in a distant city will quarrel with his wife three seasons hence and a murderer will be hanged before I finish speaking. From the falling of a stone I know the number of maidens being seduced and the movements of icebergs on the other side of the world. From the texture of the wind I know where next the lightning will fall. So long have I watched and so much am I part of all things, that nothing is hidden from me.”
“You know where I go?”
“Yes.”
“And what I would do there?”
“I know that, too.”
“Then tell me if you know, will I succeed in that which I desire?”
“You will succeed in that which you are about, but by then it may not be what you desire.”
“I do not understand you, Morningstar.”
“I know that, too. But that is the way it is with all oracles, Jack. When that which is foreseen comes to pass, the inquirer is no longer the same person he was when he posed the question. It is impossible to make a man understand what he will become with the passage of time; and it is only a future self to whom a prophecy is truly relevant.””

Source: Jack of Shadows (1971), Chapter 6 (p. 62)