“Complete ignorance with regard to certain matters is perhaps the best thing for children; but let them learn very early what it is impossible to conceal from them permanently. Either their curiosity must never be aroused, or it must be satisfied before the age when it becomes a source of danger. Your conduct towards your pupil in this respect depends greatly on his individual circumstances, the society in which he moves, the position in which he may find himself, etc. Nothing must be left to chance; and if you are not sure of keeping him in ignorance of the difference between the sexes till he is sixteen, take care you teach him before he is ten.”
Emile, or On Education (1762), Book IV
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Jean Jacques Rousseau 91
Genevan philosopher 1712–1778Related quotes

Ch. VII, Social Problems in the Forest, p. 130 https://archive.org/stream/ontheedgeofthepr007259mbp#page/n163/mode/2up (1924 translation by Ch. Th. Campion); Schweitzer later repudiated such statements, saying "The time for speaking of older and younger brothers has passed.", as quoted in [Forrow, Lachlan, Foreword, Russell, C.E.B., African Notebook, Syracuse University Press, Albert Schweitzer library, 2002, 978-0-8156-0743-4, http://books.google.com/books?id=qa-TVXEkY3sC&pg=PR13, 23 June 2017, xiii]
Variant:
The African is my brother — but he is my younger brother by several centuries.
As quoted in The Observer (23 October 1955)
On the Edge of the Primeval Forest (1922)
7.4 Ecology and Flexibility in Urban Civilization
Steps to an Ecology of Mind (1972)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 125.
Source: Organizational stress: Studies in role conflict and ambiguity, 1964, p. 20
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 158.