“Boredom lies only with the traveler's limited perception and his failure to explore deeply enough.”

Preface
A Book of Travel to Three Continents (Translated from Dahri) (1914)

Source: The Sign of Four

Source: Tristes Tropiques (1955), Ch. 1 : Setting Out, p. 17
Context: I hate travelling and explorers. Yet here I am proposing to tell the story of my expeditions. But how long it has taken me to make up my mind to do so! It is now fifteen years since I left Brazil for the last time and all during this period I have often planned to undertake the present work but on each occasion a sort of shame and repugnance prevented me from making a start. Why, I asked myself, should I give a detailed account of so many trivial circumstances and insignificant happenings? Adventure has no place in the anthropologists profession; it is merely one of those unavoidable drawbacks, which detract from his effective work through the incidental loss of weeks or months; there are hours of inaction when the informant is not available; periods of hunger, exhaustion, sickness perhaps; and always the thousand and one dreary tasks which eat away the days to no purpose and reduce dangerous living in the heart of the virgin forest to an imitation of military service … The fact that so much effort and expenditure has to be wasted on reaching the object of our studies bestows no value on that aspect of our profession, and should be seen rather as its negative side. The truths which we seek so far afield only become valid when we have separated them from this dross.

"Doll Factory, Gun Factory" (1973), essay reprinted in The Maker of Dune : Insights of a Master of Science Fiction (1987), edited by Tim O'Reilly
General sources

Page 168
The Doors of Perception (1954)

Source: I, Lucifer

Source: 1960s, The Gutenberg Galaxy (1962), p. 183