How to Reframe Negative Thoughts Into Positive Ones?

Has anyone ever questioned why it's so simple to notice the bad things in one's life before observing the pleasure? Even a scholar has to discipline himself to avoid picking out the incorrect information on a document before fully getting the gist of it. He needs to put some effort into it. It will be challenging for anyone to detect even when it's happening if people don't get accustomed to consistently examining themselves in truthfulness and honesty.
Even after that, individuals always undergo the denial stage. People are aware of it as they experience it themselves. The individual realization of how skeptical one has become and how it was so simple to dwell on the negative traits before the positivity arrived is a huge learning curve to admire. If one starts examining one's thoughts and actions carefully after coming to terms with the reality that such was the case, one eventually begins to notice a pattern.
It could take people some time to recognize it, but once they commit, they'll be able to proceed with making suitable changes.