It cannot be denied that nature is influential in shaping us to her will and making us reveal our rich or meager endowment; yet it must be admitted that she has less power over us than custom, for the reason that native endowment, no matter how good, is dissipated unless encouraged, whereas environment always shapes us in its own way, whatever that may be, in spite of nature's gifts.
 Étienne de La Boétie, Discourse on Voluntary Servitude (1576). copy citation

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Author Étienne de La Boétie
Source Discourse on Voluntary Servitude
Topic custom power
Date 1576
Language English
Reference
Note Translated by Harry Kurz
Weblink https://en.wikisource.org/wiki/Discourse_on_Voluntary_Servitude

Context

“Nevertheless it is clear enough that the powerful influence of custom is in no respect more compelling than in this, namely, habituation to subjection. It is said that Mithridates [14] trained himself to drink poison. Like him we learn to swallow, and not to find bitter, the venom of servitude. It cannot be denied that nature is influential in shaping us to her will and making us reveal our rich or meager endowment; yet it must be admitted that she has less power over us than custom, for the reason that native endowment, no matter how good, is dissipated unless encouraged, whereas environment always shapes us in its own way, whatever that may be, in spite of nature's gifts. The good seed that nature plants in us is so slight and so slippery that it cannot withstand the least harm from wrong nourishment; it flourishes less easily, becomes spoiled, withers, and comes to nothing.” source