<human>: Can you give me a shortened version of the text?

Background: I'm agnostic, leaning toward atheist, and majoring in Biology. I went through a couple existential crises back in high school, revolving around the cliche' "nothing really matters" issue. Eventually I pulled through not because of an emotional breakthough, but more just a desire to remain in stasis; I believe it was Einstein that said something along the lines of, "Only a fool quits the known for the unknown," and that has been my basic justification for sticking around.

But enough about me; this is about a friend, who appears to be going through a similar issue. He's agnostic/atheist with no strong spiritual ties. The problem is, I don't have any surefire advice to give him. Ultimately, when looked at logically, nothing really matters; after all, once one embraces sweet oblivion, it doesn't matter if you were a billionaire or pauper, loved by all or Justin Bieber. As a biologist, I know better than most how little of a fuck Mother Nature gives about the individual; no one person matters in the ultimate scheme of things. An emotional appeal won't work here; doesn't matter if people are pissed at you for offing yourself, and it doesn't matter how many loved ones you'll leave behind, as, once again, nothing matters after the fact.

He's asking advice from me because he knows I've gone through the same thing. Unfortunately, the only thing I can tell him is that, logically, he's completely right. There is no reason outside of emotion to stick around. Obviously, this isn't exactly the best thing to tell a person that the university's counseling services has tried to hospitalize, and as such, I'm asking Reddit: what do I tell him to make him stick around?
<bot>: Friend going through an existential crisis, and an emotional appeal is doomed to failure; how to convince of the "value of life" through logical and rational means only?