This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...airplane, how to perform an appendectomy, how to produce an electric light bulb or an electronic tube or a cyclotron or a box of matches. Yet his life depends on such knowledge — and only a vo litional act of his consciousness, a process of thought, can provide it.

But man’s responsibility goes still further: a process of thought is not automatic nor “instinctive”
nor involuntary — nor infallible. Man has to initiate it, to sustain it and to bear responsibility for its results. He has to discover how to tell what is true or false and how to correct his ...
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