glass half full/half empty

glass-half-empty

(used as a modifier before a noun) Of or characterized by a generally pessimistic worldview. Mark is such a glass-half-empty kind of guy that he will find a way to see even the best situation in a negative light.

glass-half-full

(used as a modifier before a noun) Of or characterized by a generally optimistic worldview. Rebecca has such a glass-half-full mentality that even when her company went bankrupt she simply saw it as a learning experience for the future.

see the glass as half empty

To view a situation as generally worse or less hopeful than might otherwise be perceived; to be pessimistic. When it comes to the state of the world, most people see the glass as half empty. But they forget all the progress that has been made.
See also: empty, glass, half, see

see the glass as half full

To view a situation as generally better or more hopeful than might otherwise be perceived; to be optimistic. When it comes to the state of the world, I tend to see the glass as half full. People forget all the progress that has been made.
See also: full, glass, half, see

(see the) ˌglass half ˈfull/half ˈempty

used to describe whether somebody has a positive or negative attitude towards something: People are prepared to see the glass half full at the moment rather than half empty.He’s a glass-half-full type of guy (= he always expects good things to happen).
See also: empty, full, glass, half