Is the glass half empty or half full?

Actually waiting for inspiration to struck..but seems like my muse is not with me now...

What I want to write about is about how we perceive things. Just this afternoon I heard two female teachers whining (maybe I should use the word complaining...it sounds softer...) about the course. And I’d like to quote – “we’ve already learnt this in college...it’s a waste of time...” so that got me thinking. Our views of the same thing or in this case - course are different. As for me, I want to learn how to improve my teaching. So when I am asked to attend one, I want to grab the chance to get as much input as possible. Insya Allah, I will try to improve my teaching....

From wikipedia:

Is the glass half empty or half full? is a common expression, used rhetorically to indicate that a particular situation could be a cause for optimism (half full) or pessimism (half empty); or as a general litmus test to simply determine if an individual is an optimist or a pessimist. The purpose of the question is to demonstrate that the situation may be seen in different ways depending on one's point of view and that there may be opportunity in the situation as well as trouble.
This idiom is used to explain how people perceive events and objects. Perception is unique to every individual and is simply one's interpretation of reality. The phrase "Is the glass half empty or half full" can be referred to as a philosophical question.

P.S: so which one are we? I hope in a positive group!