Your wife is not the most beautiful girl you've dated, she is not the richest affiliate you've ever had, she's not the greatest sex machine you've ever had, she is simply that lady who "meets" you, who completes you, who fills you, who adds to you that which all others failed in adding to you.
A man should know that which he is already and know that which he needs added unto him. The definition thereof is your wife.
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From @gregjava