Here’s my definition of optimism:
Optimism is the ability to persist through bouts of itching negativity while maintaining your equanimity.
What determines your outlook depends on how well you cope with bad and potentially disastrous experiences while keeping realistic expectations and preparing a proper mindset for the future. Thoughts and action usually go hand in hand.
“To succeed, you must persist through C. R. A. P. – Criticism, Rejection, Assholes, & Pressure.” – Richard St. John
In short, “You got to keep on keeping on.”