The greatest illusion is that mankind has limitations.

Robert A. Monroe (1915–1995) was an American pioneer in the study of out-of-body experiences, astral projection, and non-ordinary states of consciousness. With the help of other engineers, he developed the technology Hemi-Sync, a sound healing modality designed to support better sleep and overall function. He is also the founder of The Monroe Institute, a nonprofit devoted to the exploration of consciousness.