Recall what has been said about the subconscious mind resembling a fertile garden spot, in which weeds will grow in abundance, if the seeds of more desirable crops are not sown therein.  AUTOSUGGESTION is the agency of control through which an individual may voluntarily feed his subconscious mind on thoughts of a creative nature, or, by neglect, permit thoughts of a destructive nature to find their way into this rich garden of the mind.

– Napoleon Hill, Think & Grow Rich