buddhism has that too. if people were offing themselves in hopes of somehow reaching enlightenment thru killing, i’ve never heard of it. lol. the buddhist reasoning is that killing in general is bad but killing oneself is the worst of all because the one being that can choose to become enlightened (or at least try) and that you have control over is yourself. “so get crackin’” being the idea there.
My cult taught my 13 yo self that were I to take my own life, I would have to re-experience the life that led me to suicide in order for my soul to learn the lesson. But since I robbed another soul of the oppertunity to live as me, I'd have added bad karma and would reincarnate in (a non specified country in) africa. No more help was offered.
I've beaten depression, but suffered losses in cognition due to its severity and length.
Suicide is only a sin, so it would theoretically be forgiven. Problem is you must atone for your sins before death, and there no way to atone if your dead by your own hand.
I am aware of no such passage. Heaven didn't occur to the people in that area until very late in the Bible writings. It is highly likely an introduction from the Greeks.