“"I thought they'd never fall asleep." Ivan paused; a slow smirk displaced the snarl on his face. "But they were smiling, when they finally did."”

An Elegie; or Friend's Passion for his Astrophill, reported in Bartlett's Familiar Quotations, 10th ed. (1919).

A Spy in the House of Love (1954)

Variant: You know you're in love when you can't fall asleep because reality is finally better than your dreams.

Source: A Matter of Magic

Source: Almost Like Being in Love

The Great Movies II (2005), p. 94
Context: It's said that Chaplin wanted you to like him, but Keaton didn't care. I think he cared, but was too proud to ask. His films avoid the pathos and sentiment of the Chaplin pictures, and usually feature a jaunty young man who sees an objective and goes for it in the face of the most daunting obstacles. Buster survives tornados, waterfalls, avalanches of boulders, and falls from great heights, and never pauses to take a bow: He has his eye on his goal. And his movies, seen as a group, are like a sustained act of optimism in the face of adversity; surprising, how without asking, he earns our admiration and tenderness.
Because he was funny, because he wore a porkpie had, Keaton's physical skills are often undervalued … no silent star did more dangerous stunts than Buster Keaton. Instead of using doubles, he himself doubled for his actors, doing their stunts as well as his own.

Responding to assertions of discord between herself and Fred Astaire; quoted in "Leading Couples", by TCM's Robert Osborne, p. 11.

Source: Paladin of Souls

Source: Man With Bags