“I think the Holy Grail is a dream that men have, a dream that the world can be made perfect. And if it existed, then we'd all know the dream can't come true.”

Source: Wings of Fire, p. 112.

As quoted in Bursting at the Seams : A Wealth of Wit and Wisdom by, for, and about Women (2004) edited by Killy John and Alie Stibbe

As quoted in "Sport: Larry Holmes: I Still Have It" by Tom Callahan in TIME (21 June 1982).

Taylorville Native Joyce Taylor Sees Hollywood Dream Come True https://www.newspapers.com/clip/8230660/the-decatur-daily-review/ (25 June 1961)

As quoted in Perceive This! : How to Get Everything You Want Out of Life by Changing Your Perceptions (2004) by Kevin A. Martin, Ch. 9, No Bar Too High!, p. 64
Context: Somehow, I can't believe that there are any heights that can't be scaled by a man by a man who knows the secret of making dreams come true. The special secret it seems to me is summarized in four C's. They are Curiosity, Courage, Confidence and Constancy. And the greatest of all is Confidence. When you believe in a thing, believe in it all the way, implicitly and unquestionably.

Source: Water Sleeps (1999), Chapter 87 (p. 314)

Source: How to Be Like Walt : Capturing the Magic Every Day of Your Life (2004), Ch. 3 : Imagination Unlimited, p. 63; Unsourced variant: All your dreams can come true if you have the courage to pursue them.