People often use the metaphor of the glass being half full or half empty to talk about positive or negative perceptions.

While this of course has its place, I was particularly impressed by a re-working of this quote by a client. They said;
The glass is always full, it just depends if you want the glass to be full of air or water
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Marc West
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http://www.cybaea.net/ Allan
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Anonymous
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Daniel Steyn
