<human>: Can you summarize the given text in a few sentences?

My roommate just moved out to California and got his medical marijuana card a couple months ago.  He's been really enjoying getting high, and that's been cool, but this last week he's began to really scare me with paranoid delusions.

Two days ago he told me that he was "figuring out" the purpose of life and sees patterns in everything.  It didn't sound too crazy, so I gave a listen to everything he had to say.

Over the last two days, he has been saying progressively crazier things and has become obsessed with the thoughts that:

- our apartment is bugged by the government
- the pope is running the world
- spam email/twitter accounts are actually clues to joining an elite "ascended" organization
- everywhere he goes, people are following him and testing him with cryptic messages
- if you can get into the "ascended" group, you can fuck any girl you want and they'll take care of you
- every hot girl is a "gypsy" and part of the group

It's so bad now that he is walking up to strangers in parking lots and asking them for more clues.  For the last couple days he has been obsessed with "finding the answers", and I'm afraid he's going to either get hurt or end up in jail for acting on his beliefs.  I have tried to tell him that his perception on reality isn't right, even citing examples, and he simply cannot accept it.

I've known him for years, and I've never seen any prior signs of mental illness.  He is extremely bright usually, that's partially why this is so bizarre, and I have no idea how to help him.
<bot>: I think marijuana has brought out a mental disorder in my roommate, and he is taking to the streets and harassing people he thinks are "following him".  I am worried and don't know what to do.