Who would you be without the thought that happiness depends on someone else?
If your happiness depends on your children being happy, that makes them your hostages. So stay out of their business, stop using them for your happiness, and be your own happiness. And that way you are the teacher for your children: someone who knows how to live a happy life.
Ultimately, I am all I can know.
Arguing with reality it like trying to teach a cat to bark.
Every mind deserves to be free. When the mind is free, that's the end of suffering.
Do you want to be right more than you want to know the truth? It's the truth that set me free. Acceptance, peace, and less attachment to a world of suffering are all effects of doing The Work. They're not the goals. Do The Work for the love of freedom, for the love of truth.