“What we anticipate seldom occurs; what we least expected generally happens.”
Book 2, chapter 4. Compare: "I say the very things that make the greatest Stir / An' the most interestin' things, are things that did n't occur", Sam Walter Foss, Things that did n't occur.
Books, Coningsby (1844), Henrietta Temple (1837)
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Benjamin Disraeli 306
British Conservative politician, writer, aristocrat and Pri… 1804–1881Related quotes

"Physics is always a gamble" http://www.thehindu.com/opinion/interview/nobel-laureate-david-gross-physics-is-always-a-gamble/article7383717.ece, an interview with David Gross by Shubashree Desikan, The Hindu (2015)

“It is seldom that we find either men or places such as we expect them.”
No. 58 (May 26, 1759)
The Idler (1758–1760)
Context: It is seldom that we find either men or places such as we expect them.... Yet it is necessary to hope, though hope should always be deluded, for hope itself is happiness, and its frustrations, however frequent, are yet less dreadful than its extinction.

“Life, Tavi reflected, seldom makes a gift of what one expects or plans for.”
Codex Alera, First Lord's Fury (2009)

“There is little difference between expecting misfortune and undergoing it; except that grief has limits, whereas apprehension has none. For we grieve only for what we know has happened; but we fear all that possibly may happen.”
Parvolum differt, patiaris adversa an exspectes; nisi quod tamen est dolendi modus, non est timendi. Doleas enim quantum scias accidisse, timeas quantum possit accidere.
Letter 17, 6.
Letters, Book VIII

“Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.”
As quoted in Dictionary of Thoughts (1908) by Tryon Edwards, p. 22.
Decade unclear
Variant: Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.