I know enough about the moon ...

I know enough about the moon to know how unpleasant and inhospitable it is. . . . I know enough about Mars to know that you can't live there, you can't settle it. Mars and the moon are two ugly islands. So then, you say, what's the point of going to them? The point is to be able to say I've been there, I've set foot on them, and I can go further to look for beautiful islands.
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 Wally Schirra

Quotes from the same author

You don't raise heroes, you raise sons. And if you treat them like sons, they'll turn out to be heroes, even if it's just in your own eyes.
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 Wally Schirra
Feeling weightless... it's so many things together. A feeling of pride, of healthy solitude, of dignified freedom from everything that's dirty, sticky. You feel exquisitely comfortable... and you feel you have so much energy, such an urge to do things, such an ability to do things. And you work well, yes, you think well, without sweat, without difficulty as if the biblical curse in the sweat of thy face and in sorrow no longer exists, As if you've been born again.
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 Wally Schirra
When a man looks across a street, sees a pretty girl, and waves at her, that's not a rendezvous, that's a passing acquaintance. When he walks across the street and nibbles on her ear, that's a rendezvous!
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 Wally Schirra