From The Science of Getting Rich: There is nothing wrong in wanting to get rich. The desire for riches is really the desire for a richer, fuller, and more abundant life; and that desire is praise worthy.
Every thought of form, held in thinking Substance, causes the creation of the form, but always, or at least generally, along lines of growth and action already established.
Men get rich by doing things in a Certain Way; and in order to do so, men must become able to think in a Certain Way. A man’s way of doing things is the direct result of the way he thinks about things.
Since belief is all important, it behooves you to guard your thoughts; and as your beliefs will be shaped to a very great extent by the things you observe and think about, it is important that you should command your attention.