What should I say my friend, when he can't decide, what religion he should believe?

Honestly if I was in your shoes the first thing I'd tell berkata friend is: I can't help anda choose a religion. It is up to anda to develop an independent mind and figure out what do anda truly believe in. And anda shouldn't allow anyone including me tell what to believe atau not believe. if anda choose to be an atheist atau something out of the choices you've listed already. It would be still your choice first and foremost.

And that would be the Nasihat I'd give them. I believe strongly in the right to think independently. Things like religion isn't something anda decide based on advice. It's something anda decide based on your own opinion and what anda truly believe in. if she can't think I'll suggest her to read buku based on both religions constantly to get a better idea about them.

I would say, "I'm sorry. I can't help anda decide what religion to follow. That's something anda decide on your own. Besides, anda shouldn't rush. anda don't have to choose a religion at eighteen. anda don't even have to choose one at all. Not everyone follows a religion."

Why does she even have to choose she can believe in both if she wants to.

I'm not sure about Buddhism, but I know that with the different sects of Christianity, she has many people she could talk to, Bibles to read, and information based on the Bible. I know in this area (and many places) the Jehovah Witnesses would be happy to do a Bible study with her - in her own utama atau a place that she would like to study.

After she has enough information on the religions - she could make a decision for herself. I guess the best Nasihat I could give is to look into the two religions she has to choose from, and then make her own decision.