here another good one:

[...] So who am I? I am tempted to give my favourite answer "I don't know". But even that would be inappropriate. I - as a body, a public person and the subject of these sentences can only answer by means like writing this essay. "I" as a mental model can never know except by embedding models within models. Really "I" can do nothing but go on living moment by moment until "I" die. Whether that will be at the same time as this body dies or before I cannot predict. I am as sure as I can be that it won't be afterwards.

Dr. Susan Blackmore