The mind of the greatest man on earth is not so independent of circumstances as not to feel inconvenienced by the merest buzzing noise about him; it does not need the report of a cannon to disturb his thoughts. The creaking of a vane or a pully is quite enough. Do not wonder that he reasons ill just now; a fly is buzzing by his ear; it is quite enough to unfit him for giving good counsel.

Blaise Pascal
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