A true friend knows the difference between what you need to hear and what you want to hear, and gives you both in appropriate measure according to circumstance.

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A friend is the most tesseractical of persons. One who is complex and simple; one who can be all things at once, or only one thing at a time.

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One who is not hidden from you and does not hide, one who has the goods on you and you don't mind, one whom you choose as family.

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The person with whom you have the in-jokes.