This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...litional act of his consciousness, a process of thought, can provide it.
read full book
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
own errors; he has to discover how to validate his concepts, his conclusions, his knowledge; he has to discover the rules of thought, the laws of logic , to direct his thinking. Nature gives him...