Where is the glass?

Half full or half empty? I oscillate between seeing how much work I've done and how much weight I've lost and seeing how much more work I have to do, how much longer it's going to take and how much weight I still have to loose. It's uncomfortable to have my self image swing so rapidly. I feel like it should be more constant. I do swing more towards the 'full' side than the 'empty' but the 'empty' is so much harder to handle, overcome and deal with. Maybe negativity got me where I am and it's a process not to think like that anymore. All I can do is put the work in everyday.