If we notice that a friend is living in a fantasy world, should we destroy his illusions or is that dangerous?

Lama Ole’s answer:

Would he jump out of the window if you destroy his fantasy? If he would, then you don’t have a friend, you have a patient. You have to check whether people can handle it when you tell them what is really happening. If they can take it, then you can destroy their illusions. Afterwards, you should stay friendly, keep your distance, but be there protectively and make good wishes.

If you can’t say anything, then in the end you can only wish them the best. Try to help them two or three times, and if that doesn’t work, then simply be nice and make good wishes.