Although it may take time, I can change how I feel - I know my feelings can change, because I haven't always felt like I do today ...

I can change my thinking - I haven't always thought about things the way I do now, I can recall a time when I was more optimistic, and...

I can start to do things differently straight away - I don't need to feel differently before I do something different. A small change can be a step in the right direction!