Full Idea
According to Buddhism, the idea of a permanent, constant self is an illusion, and a morally dangerous one.
Gist of Idea
For Buddhists a fixed self is a morally dangerous illusion
Source
Owen Flanagan (The Problem of the Soul [2002], p.161)
Book Reference
Flanagan,Owen: 'The Problem of the Soul' [Basic Books 2003], p.161
A Reaction
We are familiar with the idea that it might be an illusion, but I am unconvinced by 'morally dangerous'. If you drop both free will and personal identity, I can't see any sort of focus for moral life left, but I am willing to be convinced.