the idea of their full worth, or you cannot succeed. No matter how
valuable your services _might_ be, they have only potential worth until
another man, or some business, or the world at large _perceives
desirable possibilities in you and buys the expectation that you will
"deliver the goods_."

Probably you have said to yourself, "If I had the chance, I know I could
deliver the goods." We will grant that you are able to make delivery.
However, _before you will be given a chance_ you must get across to the
mind of some prospective buyer of muscular power, or brain energy, or
other capabilities such as you could supply, the true idea that _you
have_ "the goods" he needs and that your qualifications would be a
satisfactory purchase _for him_.

In other words, it is necessary that you use _the selling process_
effectively, with thorough scientific knowledge and a high degree of
art, _in order to make certain of gaining your opportunity_ for success.
You have no doubt that you can succeed if you get the chance. But you
have not realized, perhaps, that _you can make yourself the master of
your own destiny by first learning and then practicing until it becomes
second nature to you the sure, salesmanship way to gain the
opportunities you deserve_. After you _comprehend_ the sure process, you
can soon develop _skill in actually selling_ to other men true ideas of
the best that is in you.

[Sidenote: The Secret of Certain Success]

The secret of _certain success_ in life for you, then, _whatever your
vocation or ambition_, lies in knowing HOW to sell true ideas of your
best capability in the right market or field of service. The chapters of