BBT quotes- You'll enjoy them even if you haven't watched the show!

Penny: I'm a Sagittarius, which probably tells you way more than you need to know.

Sheldon: Yes, it tells us that you participate in the mass cultural delusion that the sun's apparent position relative to arbitrarily defined constellations at the time of your birth somehow affects your personality.
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Penny: If Leonard comes to know that I lied to him, I would absolutely die of embarrassment.

Sheldon: Physiologically impossible.
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Leonard: You are not Isaac Newton.
Sheldon: No, no, that's true. Gravity would have been apparent to me without the apple.
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Sheldon: You know, it's amazing how many super villains have advanced degrees. Graduate schools should do a better job of screening those people out.
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Sheldon: You bought me a present? Why would you do such a thing? I know you think you're being generous, but the foundation of gift giving is reciprocity. You haven't given me a gift, you've given me an obligation. The essence of the custom is that I now have to go out and purchase for you a gift of commensurate value and representing the same perceived level of friendship as that represented by the gift you've given me. Ah, it's no wonder suicide rates skyrocket this time of year. Oh, I brought this on myself by being such an endearing and important part of your life...
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Sheldon: A fear of heights is illogical. A fear of falling, on the other hand, is prudent and evolutionary.
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Penny: I give up. He's impossible!
Sheldon: I can't be impossible; I exist! I think what you meant to say is, 'I give up; he's improbable'.
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Sheldon: In A World Of Emoticons, I'm Colon Capital D
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Sheldon: What are you talking about?
Leonard: The cultural paradigm in which people have sex after 3 dates.
Sheldon: I see. Now, are we talking date the social interaction or date the dried fruit?
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Sheldon: Why are you crying?
Penny: Because I'm stupid!
Sheldon: That's no reason to cry. One cries because one is sad. For example, I cry because others are stupid, and that makes me sad.
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Sheldon: I made tea.
Leonard: I don't want tea.
Sheldon: I didn't make tea for you. This is my tea.
Leonard: Then why are you telling me?
Sheldon: It's a conversation starter.
Leonard: That's a lousy conversation starter.
Sheldon: Oh, is it? We're conversing. Checkmate.
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Sheldon: My new computer came with Windows 7. Windows 7 is much more user-friendly than Windows Vista......I don't like that.