
Emphatic and reiterated assertion, especially during childhood, produces in most people a belief so firm as to have a even over the unconscious, and many of us who imagine that our attitude towards orthodoxy is quite emancipated are still, in fact, subconsciously controlled by its teachings.
Source: Bertrand Russell :Marriage and Morals, 1929
More info.: https://russell-j.com/beginner/MM05-100.HTM