The Doors of His Face, The Lamps of His Mouth (1965)
“The mind is like an iceberg.”
According to this Google Search result https://www.google.com/search?lr=lang_en&tbs=cdr%3A1%2Ccd_min%3A1800%2Ccd_max%3A1920%2Clr%3Alang_1en&tbm=bks&ei=RxfhW-PSCdfbhwOOwYrYBQ&q=%22the+mind+is+like+an+iceberg%22&oq=%22the+mind+is+like+an+iceberg%22&gs_l=psy-ab.3...364980.365440.0.366452.4.4.0.0.0.0.108.108.0j1.1.0....0...1c.1.64.psy-ab..3.0.0....0.cttgYpsxz1o, the earliest reference on this quote belongs to Hon. B. G. Northrop in 1884. But the person who popularized it might be G. Stanley Hall https://en.wikipedia.org/wiki/G._Stanley_Hall.
Misattributed
Help us to complete the source, original and additional information
Sigmund Freud 147
Austrian neurologist known as the founding father of psycho… 1856–1939Related quotes

“Over the sea and far away
She's waiting like an iceberg
Waiting to change…”
"Other Side of the World".
Eye to the Telescope (2004)

Referring to Treasurer Peter Costello, ABC Radio interview, March 5, 2007.

“The euro Titanic has now hit the iceberg - and there simply aren't enough lifeboats to go round.”
Segment from a speech held in the European Parliament in Strasbourg, 13 June 2012. The Genius of Mutual Indebtedness - Nigel Farage http://www.youtube.com/watch?v=TN_1mF-3JTI&list=PL25613E6F90B320EC&index=27&feature=plpp_video
2012

On how her experiences with sexual harassment influenced the song “Hungry Baby” on her solo album No Home Record in “Kim Gordon: 'There's a wall of faceless men I have to climb over'” https://www.theguardian.com/music/2019/oct/04/kim-gordon-theres-a-wall-of-faceless-men-i-have-to-climb-over in The Guardian (4 Oct 2019)
.... The vast cradle of Hindu culture is literally littered with ruins of temples and monasteries belonging to all sects of Sanatana Dharma - Buddhist, Jain, Saiva, Shakta, Vaishnava and the rest. ... The story of how Islamic invaders sought to destroy the very foundations of Hindu society and culture is long and extremely painful. It would certainly be better for everybody to forget the past, but for the prescriptions of Islamic theology which remain intact and make it obligatory for believers to destroy idols and idol temples.
Hindu Temples – What Happened to Them, Volume I (1990)

"Yana Gupta" https://web.archive.org/web/20051224063325/http://www.bollywoodgate.com/indian-models/yana-gupta.html, Bollywoodgate.com (archived on 24 December 2005).