“If I die prematurely, at any rate I shall be saved from being bored by my own success.”

The Wildgrave’s smile was bitter. “What logic provides you with that hope, von Bek? If God is merciful, He provides us with little evidence.”
Source: The von Bek family, The War Hound and the World's Pain (1981), Chapter 6 (p. 79)

The Bicycle Rider In Beverly Hills (1952)

Predicting that he would go senile, as quoted in The Highway of Letters and its Echos of Famous Footsteps (1893) by Thomas Archer, p. 380

The Tragic Sense of Life (1913), VI : In the Depths of the Abyss
Context: I will not say that the more or less poetical and unphilosophical doctrines that I am about to set forth are those which make me live; but I will venture to say that it is my longing to live and to live for ever that inspires these doctrines within me. And if by means of them I succeed in strengthening and sustaining this same longing in another, perhaps when it is all but dead, then I shall have performed a man's work, and above all, I shall have lived. In a word, be it with reason or without reason or against reason, I am resolved not to die. And if, when at last I die out, I die altogether, then I shall not have died out of myself — that is, I shall not have yielded myself to death, but my human destiny shall have killed me. Unless I come to lose my head, or rather my heart, I will not abdicate from life — life will be wrested from me.

Source: The Fountainhead

Lighthousekeeping (2004)

Philips v. Bury (1694), 2 T. R. 358.

Comments on his final election defeat (11 August 1835) Ch. 2; in Dr. Swan's Prescriptions for Job-Itis (2003) by Dennis Swanberg and Criswell Freeman, p. 45, part of this seems to have become paraphrased as "Let your tongue speak what your heart thinks." No earlier publication of this version has been located.
Col. Crockett's Exploits and Adventures in Texas (1836)

Cf. Richard Dawkins (2003), A Devil's Chaplain: «There is more than just grandeur in this view of life, bleak and cold though it can seem from under the security blanket of ignorance. There is deep refreshment to be had from standing up and facing straight into the strong keen wind of understanding: Yeats's 'Winds that blow through the starry ways'.»
1920s, What I Believe (1925)
Source: Why I Am Not a Christian and Other Essays on Religion and Related Subjects
Context: Religion, since it has its source in terror, has dignified certain kinds of fear and made people think them not disgraceful. In this it has done mankind a great disservice: all fear is bad. I believe that when I die I shall rot, and nothing of my ego will survive. I am not young and I love life. But I should scorn to shiver with terror at the thought of annihilation. Happiness is nonetheless true happiness because it must come to an end, nor do thought and love lose their value because they are not everlasting. Many a man has borne himself proudly on the scaffold; surely the same pride should teach us to think truly about man's place in the world. Even if the open windows of science at first make us shiver after the cosy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigour, and the great spaces have a splendour of their own.