There is power in words. What you say is what you get.
Happiness is the result of what you do.
You can finish school, and even make it easy - but you never finish your education, and it's seldom easy.
Don't let someone who gave up on their dreams talk you out of going after yours.
I wouldn't say 'most' people are prone to negativity. I think it's probably that most people allow negativity to color their thinking, depending on circumstances, but I also believe most people make the necessary efforts to return to positive thinking as quickly as possible.
You plus God equals enough.