“… he sang with his eyes squeezed tight, as if he were dropping from a great height.”

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.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 293.

Source: Spin (2005), p. 377

Source: Drums of Autumn

Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter LXXXV: On Some Vain Syllogisms

Source: Sapphique

Variant: You are my courage, as I am your conscience," he whispered. "You are my heart---and I your compassion. We are neither of us whole, alone. Do ye not know that, Sassenach?
Source: Drums of Autumn