I wasn't asking "can you change other people", I was asking if people could change.
You believe that people could change, but "大毛病反正是改不了的了". Isn't that contradictory?
分人分事 = 没说
People are all changing, it's not necessary caused only by pressure. Education, age, life experience......day after day, year after year, do you think that you are still the same person who just walked out from university?
Yes and no, I'm not the same person fresh out of college, but my principles stay the same more or less, so far. So in that sense, I'm still the same person. People don't really change, it's probably built in our DNAs.
p.s. Principles refer to those foundational beliefs that form who you are.