"A sneeze travels at a peak velocity of two hundred miles per hour. A burp, more slowly; a fart, slower yet. But a kiss thrown by fingers- its departure is sudden, its arrival ambiguous, and there is no source that can state with authority what speeds are reached in its flight."

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A map in the hands of a pilot is a testimony of a man's faith in other men; it is a symbol of confidence and trust. It is not like a printed page that bears mere words, ambiguous and artful, and whose most believing reader - even whose author, perhaps - must allow in his mind a recess for doubt. A map says to you, 'Read me carefully, follow me closely, doubt me not.' It says, 'I am the earth in the palm of your hand. Without me, you are alone and lost.

— Beryl Markham