If you need to give one last lecture before u die, What u would talk on

I love teaching (not preaching of course) it’s my passion, so I am in my current job. Out of the blue, I got a nightmarish idea.”If you need to give one last lecture before u die.
What would u talk on?”

After a lot of alternates, I zeroed on non technical, but more emotional domain that set in motion every day of our life.

I would talk on fatherhood (there is nothing like that, as only motherhood exists), so will introduce that to the world. Courtesy: my two year old daughter Rhea.

What will u talk about??