“Sometimes, when things take longer than you thought they would, it's just a gentle reminder from your greater self that you have more time than you thought, and that there's a journey to enjoy.”

I Have Been Here Before, Act III.

Source: The Heart of Betrayal

Variant: The only thing that stands between you and your well-being is a simple fact: you have allowed your thoughts and emotions to take instruction from the outside rather than the inside. On
Source: Inner Engineering: A Yogi's Guide to Joy

Source: Jonathan Livingston Seagull

Twelve Virtues Of Rationality http://yudkowsky.net/rational/virtues
Context: Do not flinch from experiences that might destroy your beliefs. The thought you cannot think controls you more than thoughts you speak aloud. Submit yourself to ordeals and test yourself in fire. Relinquish the emotion which rests upon a mistaken belief, and seek to feel fully that emotion which fits the facts. If the iron approaches your face, and you believe it is hot, and it is cool, the Way opposes your fear. If the iron approaches your face, and you believe it is cool, and it is hot, the Way opposes your calm. Evaluate your beliefs first and then arrive at your emotions. Let yourself say: “If the iron is hot, I desire to believe it is hot, and if it is cool, I desire to believe it is cool.”

A variant of part of this statement is often quoted: Just because your voice reaches halfway around the world doesn't mean you are wiser than when it reached only to the end of the bar.
RTNDA Convention Speech (1958)
Context: I have no technical advice or counsel to offer those of you who labor in this vineyard, the one that produces words and pictures. You will, I am sure, forgive me for not telling you that instruments with which you work are miraculous, that your responsibility is unprecedented or that your aspirations are frequently frustrated. It is not necessary to remind you of the fact that your voice, amplified to the degree where it reaches from one end of the country to the other, does not confer upon you greater wisdom than when your voice reached only from one end of the bar to the other. All of these things you know.

Ideas, p. 23
Catching the Big Fish (2006)
Context: An idea is a thought. It's a thought that holds more than you think it does when you receive it. But in that first moment there is a spark. In a comic strip, if someone gets an idea, a lightbulb goes on. It happens in an instant, just as in life.
It would be great if the entire film came all at once. But it comes, for me, in fragments. That first fragment is like the Rosetta stone. It's the piece of the puzzle that indicates the rest. It's a hopeful puzzle piece.
In Blue Velvet, it was red lips, green lawns, and the song — Bobby Vinton's version of "Blue Velvet". The next thing was an ear lying in a field. And that was it.
You fall in love with the first idea, that little tiny piece. And once you've got it, the rest will come in time.