It matters what your outlook is towards life. You cannot possibly pinpoint what actually shapes your outlook towards life. People are different, and therefore they have different outlook towards life. But if you are one of those who view life as a puzzle you are yet to comprehensively decipher, you are not alone. Not everything in everybody's life can be perfect, perhaps that is what I feel. What I have felt is that people in general mask their imperfections behind a veil of perfections that is socially recognized. Appearance, focus on looks being a prime example.
But what I have also felt and that has made all the difference in my outlook towards life is imperfections need to be worn on our sleeves, not to be hidden but to be seen to everyone. The true positive outlook then is to embrace those very imperfections and yet try to achieve something beyond your expectations. That is a worthy experience. After all, we are not here to create our perfect self, we are here to express our authentic self with all our imperfections. An extension of this is having faith in positive outlook, it basically means your authentic self by default should be positively inclined because authenticity means being your best possible true version. And tell me which version of you loves being a pessimist.
Well written! Keep up