“A truth comes out when it must;
A dream comes true when it will.
Though the world turn to ash and dust
A secret’s a secret still.”

Bk. 5, p. 464
Acts and Monuments (1563)

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.

As quoted in Anything Is Possible: Humor and Wisdom for Success and Prosperity (1997) by Meiji Stewart, p. 73

A Brave and Startling Truth (1995)
Context: p>When we come to it
We, this people, on this wayward, floating body
Created on this earth, of this earth
Have the power to fashion for this earth
A climate where every man and every woman
Can live freely without sanctimonious piety
And without crippling fear When we come to it
We must confess that we are the possible
We are the miraculous, the true wonders of this world
That is when, and only when
We come to it.</p

Source: The Sayings and Teachings of the Great Mystics of Islam (2004), p. 86

Methods of Study in Natural History (1863), ch. 4, p. 42 https://babel.hathitrust.org/cgi/pt?id=mdp.39015065771407;view=1up;seq=56

The Last Unicorn (1968)
Context: The true secret in being a hero lies in knowing the order of things. … Things must happen when it is time for them to happen. Quests may not simply be abandoned; prophecies may not be left to rot like unpicked fruit; unicorns may go unrescued for a very long time, but not forever. The happy ending cannot come in the middle of the story.

Source: Call of Duty: My Life Before, During and After the Band of Brothers (2008), p. 107