What kind of stage are you setting for yourself? It’s easy to figure out; it depends on your feelings. If you “look on the bright side” of a situation, what it can teach you and if you look at the “bright side” of people, focusing on their good qualities (yes even your boss has them) then when that curtain opens on your stage it will reveal a play of happiness; of contentment.
But when you stand behind that curtain when it opens fuming at life in general and using the word “hate” in every sentence then your play will disappoint not only you but others close to you.
Watch what you say. It influences the way you think and your thoughts can take you to a new high or a new low.