With any hallucinations, if you can do functional brain imagery while they're going on, you will find that the parts of the brain usually involved in seeing or hearing - in perception - have become super active by themselves. And this is an autonomous activity; this does not happen with imagination.

Oliver Sacks

If a man has lost a leg or an eye, he knows he has lost a leg or an eye; but if he has lost a self - himself - he cannot know it, because he is no longer there to know it.

Oliver Sacks

I often feel that life is about to begin, only to realize it is almost over.

Oliver Sacks

In general, people are afraid to acknowledge hallucinations because they immediately see them as a sign of something awful happening to the brain, whereas in most cases they're not.

Oliver Sacks

I was always the youngest boy in my class at high school. I have retained this feeling of being the youngest, even though now I am almost the oldest person I know.

Oliver Sacks

With any hallucinations, if you can do functional brain imagery while they're going on, you will find that the parts of the brain usually involved in seeing or hearing - in perception - have become super active by themselves. And this is an autonomous activity; this does not happen with imagination.

Oliver Sacks

Elements and birthdays have been intertwined for me since boyhood, when I learned about atomic numbers.

Oliver Sacks

I feel I should be trying to complete my life, whatever 'completing a life' means.

Oliver Sacks

I think hallucinations need to be discussed. There are all sorts of hallucinations, and then many sorts which are okay, like the ones I think which most of us have in bed at night before we fall asleep, when we can see all sorts of patterns or faces and scenes.

Oliver Sacks