My metaphorical and literal answer to this age-old question:
When I see a glass that needs to be filled, I’m going to fill it. I don’t think it matters if I see it as half-full or half-empty because I’m going to fill it up anyway. I think the question for me would be if whether I see it as a glass that’s mine or not, or whether I need to fill it up or drink the contents.
In response to The Daily Prompt: The Glass
Understanding and Embracing Diversity 
Haha, good answer! I guess that’s really what is important– whether it’s my glass and if I’m going to take it.