An angry youth's Understanding of "changing yourself before changing the world"

I went to dinner with Mr. Hu the day before yesterday. While I was eating, I expressed my feelings (generally, it forced him to listen to me when he came out for dinner, hey !), I feel more and more angry. Then Mr. Hu said that my thoughts are the same as those of him two years ago. I am not familiar with this world and want to change it. He gave me a comment saying "change yourself before changing the world", and then gave me a long story, criticizing this sentence seriously.
First, as an angry youth, it should not be assimilated by this world! If the world is dark, it is very wrong to make yourself dark to adapt to the world!
Furthermore, if we change ourselves and adapt ourselves to this world, will we be able to change this world? Regardless of this topic. Even if you have the ability to change the world, after you have changed the world, you will not be able to adapt to the changed world because you have changed yourself first, then, will we change ourselves to adapt to the changed world ??? Don't you drink too much !!!
Angry youth cannot adapt to this world because many people in this world think differently from angry youth. This is the most depressing thing as a super angry youth. If an angry youth changes to adapt to this world, it will be different from that of most people, and then it will surely make the angry youth depressed. Isn't this a typical naked betrayal !!!
The saying "change yourself before changing the world" must be compiled by the ruling class to maintain its own rule! Never regard political slogans as truth!

Now I think about it. I talked more about it when I had dinner with Mr. Hu, but I couldn't remember it. That's it.
Finally, I would like to thank Hu Zong for comforting me in saying that "change yourself before changing the world". He listened to me as though it was too difficult for me to get a meal ~~~