"The mind is an iceberg—it floats with only one-seventh of its bulk above water."
Austrian neurologist and psychiatrist Sigmund Freud died #OTD in 1939.
He was the founder of psychoanalysis, a clinical method for evaluating and treating pathologies seen as originating from conflicts in the psyche, through dialogue between patient and psychoanalyst, and the distinctive theory of mind and human agency derived from it.
https://en.wikipedia.org/wiki/Sigmund_Freud#
Sigmund Freud at PG:
https://www.gutenberg.org/ebooks/author/391