This is Nezha's mantra, and the complete sentence is:
My life is not up to me, whether it is a demon or a fairy, only I have the final say.
Nezha has a catchphrase in the movie, which is very handsome. Nezha's catchphrase is that my life depends on me.
I believe that after listening to this mantra, my friends think that Nezha is particularly handsome, and there is actually the second half of this mantra. Nezha's mantra is that my life is up to me. The second part is, who am I, a demon or a fairy? Only I have the final say. The second half really sounds domineering.
The source of Nezha's mantra:
In this movie, the most passionate line in this movie is: "My life is not up to me, whether it is magic or fairy, I have the final say."
In fact, this sentence comes from Yuan Lefan's Four Commandments in the Ming Dynasty. Nezha is very inspirational, but Yuan's story is more inspirational than Nezha's.