The preceding line was about subjective time passing. He's not saying you'll be dead by 70, he's saying everything after 35 feels like it goes by way, way faster than the first 35. I certainly feel that way, and may even adjust that number down some myself.

It depends on a lot of factors - some of which are in your control, and some of which ain't. In my case, very few men on my dad's side of the family lived past 60 (and my dad only made it to 54), so in all likelihood my life is indeed already half done.

I think they meant in terms of the fact that life seems to pass more quickly when you're older, and at 36, I'm definitely feeling that.

you're missing the point, unless you're a life begins when you're 65 kinda guy

Your life is subjectively half way over at 16. Dont kid yourself.

The average US male life expectancy is 75, so: yes, actually.