Erm, I think if you know a leeeeeeeeeeetle bit about
Christianity, then you wouldn't be confused about what Smudgey is
talking about. There is a distinction between the body & the
soul. So from what I interpreted, she's saying that even if this
depressed guy manages to commit suicide & the body is dead, how
can he guarantee that his soul will be alive? Perhaps due to sin,
the soul will die soon... [ooops, Not "soon", I meant to write
"also"]
Whatever lah, I'm just giving you the gist of it, I don't really
like to preach yadda yadda yadda. So if you want to read up more,
can read the Bible 
FeowFeow