“Those who don't believe in magic will never find it.”

Source: My Fair Godmother

Source: My Most Excellent Year

Edie : Girl On Fire (2006)
Context: But I really, since I exist, at all, I believe that it's possible for people... I've lived through impossible situations. So I believe in it. I just believe, and that's the magic... That's the whole thing, you talk about magic that there's to believe in, and it is there. But most people don't really believe in it. And I refuse, like, since I'm still alive and done the things I've done and seen things and understood things as far as I have, and I am alive, I mean physically intact. When I shouldn't be, according to medical reports and so forth. I mean I should be, not here. That's all there is to it. So the magic's working and it's a rare situation.

As quoted in "Success of Harry Potter bowls author over" at CNN.com (21 October 1999)
1990s

Ainsi soit-il; ou, Les Jeux sont faits
So be it; or, The chips are down
Gallimard
1952
174
Original: (fr) Croyez ceux qui cherchent la vérité, doutez de ceux qui la trouvent; doutez de tout, mais ne doutez pas de vous-même.

Vanity Fair (February 1920)
Variant: There may be said to be two classes of people in the world; those who constantly divide the people of the world into two classes, and those who do not.
Context: There may be said to be two classes of people in the world; those who constantly divide the people of the world into two classes, and those who do not. Both classes are extremely unpleasant to meet socially, leaving practically no one in the world whom one cares very much to know.

Source: The Collected Stories of Isaac Bashevis Singer

Shampoo Planet (1992)