The idea of ​​obligatory reincarnation is one of the consequences of the belief in the immortality of the soul as the bearer of personality, and there are 3 types of reincarnation: gilgul, ibbur and dybbuk, and the last two types relate more to possession than to reincarnation

Gilgul reflects what is usually understood by reincarnation: the soul enters the fetus during pregnancy

Ibbur, “grafting”, in contrast to gilgul, occurs at some point in a person’s conscious life; the soul, which has entered the human body through ibbur, settles in it for a limited time and only in order to induce him to certain actions or to perform famous mission

Dybbuk, literally “attachment”, is an evil spirit that inhabits a person, takes possession of his soul, causes mental illness, speaks through the mouth of his victim, but does not merge with him, maintaining independence