"I don't believe in astrology; I'm a Sagittarius and we're skeptical"

This quote by Arthur C. Clarke is a humorous method of revealing his skepticism towards astrology. He is suggesting that his suspicion is a trait of his zodiac sign, Sagittarius. This might be analyzed as a way of satirizing the concept of astrology, as if to state that his hesitation is a result of his zodiac sign, rather than his own personal opinion. It might also be analyzed as a way of expressing his own individual viewpoint, as if to say that he doesn't think in astrology due to the fact that he is a Sagittarius which is the nature of his indication. In either case, this quote is a funny way of revealing his uncertainty towards astrology.