Context

I was contemplating optimism and pessimism, and how many people classify others as optimistic or pessimistic based on whether they see the glass half full or half empty. Well, I was thinking that this statement is possibly pretty inaccurate because it is taken out of any context whatsoever. For example, if I pour myself half a glass of juice, I will consider the glass half full, because I just filled it. But if I pour myself a full glass of juice and then drink half of it, I will see the glass as half empty, because I just emptied it part of the way. In this case, optimism and pessimism are totally irrelevant. I suppose if you see a random half glass of liquid sitting somewhere and don’t know if it has been filled or emptied, one may be able to determine your outlook on life.