Need some help on eulogy for daughter

My 18 yr old passed from cancer a week ago.
She was an absolute savage in most things she did. It's not an exaggeration to say that I was constantly trying to learn, in order to stay on par with her.

We often had conversations about Eleanor Roosevelt's quote about discussing people, events, and ideas. She was a teenager, so she did have the typical conversations with her sister about people. But her and I would have discussions about ideas: toxic masculinity exists, but what is positive masculinity? Where does someone's "culture" exist? Is there evil, or people who have only been exposed to bad ideas?

Here is my dilemma: is there a philosopher who talked about when someone passes away, they then become an idea? Not exactly Plato's Cave Allegory, but maybe also not separate from that. A subject I can read more about? I want to incorporate into her eulogy that she is now an idea... Even writing that seems to not make the same sense as in my head. But hopefully you understand.

I'm sure I'm not making sense. Focusing is hard right now.
So feel free to ask any questions in order for me to clarify.