On 23 December 1863, after returning from dining out and before dressing for bed, he suffered a stroke. He was found dead in his bed the following morning.
On the other hand, the human mind under the discipline of Hemi-Sync acts after the fashion of a laser beam which produces a disciplined stream of light.
Lamp vs Laser: Melissa Jager uses a metaphor to help clarify the process involved in the use of Hemi—Sync in the Gateway Experience.