This video, a lecture by Jill Bolte Taylor, has worked very well for me.
I'd post it here, but there's an error in the embed code.
Background from NYT:
JILL BOLTE TAYLOR was a neuroscientist working at Harvard’s brain research center when she experienced nirvana.
But she did it by having a stroke.
On Dec. 10, 1996, Dr. Taylor, then 37, woke up in her apartment near Boston with a piercing pain behind her eye. A blood vessel in her brain had popped. Within minutes, her left lobe — the source of ego, analysis, judgment and context — began to fail her. Oddly, it felt great.
The incessant chatter that normally filled her mind disappeared. Her everyday worries — about a brother with schizophrenia and her high-powered job — untethered themselves from her and slid away.
Her perceptions changed, too. She could see that the atoms and molecules making up her body blended with the space around her; the whole world and the creatures in it were all part of the same magnificent field of shimmering energy. Continued