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I agree with everything you said except the last sentence. There is a saying in economics: "If there's no growth then there's no life in it." If we are not making things better then our life will not stay the way it is, it will be getting worse. So, basically, we have no choice but to grow. We should be improving our knowledge, our income should be getting bigger, and our living conditions must our living conditions must improve along with it. We must be moving forward, we can't afford to stand still.
I may not have conveyed my thought very accurately, but I meant exactly what you said - if you want improvement - change, become different, change your habits, improve your knowledge and skills.
Without changing yourself, your life will not change.~
As I was saying, it will be getting worse, not just staying the same. Some people might think, "I don't want any change, I like my life as it is." And my post was for those people. I know we, you and me, mean the same things, we just put it differently. I know that, mate.

What I noticed from the conversation is that the context of thinking is the same but has a different premise from the two statements.
"Making changes" and "liking my own life as it is" are contexts that can be taken, that making changes does not mean being someone else but being yourself as you like and being the best for your version, I think it can be concluded that the purpose of life for both of them is the same, but by having its own language.
Any decision about life in terms of finances or whatever, the goal is to be better it will have a positive outcome.
Everyone has their own formula in doing anything including saving and improving themselves to be better according to their version that is adapted to their respective situations, thoughts and goals.
I think you have different thought orientations but on goals that can be conical at the same point.I think you are right about both of us and also some other posters in this thread. We all agree that saving is a good thing, but we disagree about the percentage because we live in different countries with very different salaries and for some of us saving one third of what you earn monthly is not only hard but impossible.
To you personally I want to say that I disagree that making changes does not mean being someone else. If you are accustomed to spending all your monthly income however big it is, you have to become
, someone who doesn't do as they are pleased all the time, but thinks about the future.