Here I paraphrase Hayek thus
the importance of being able to foretell the consequences of your actions and reserve some of the benefits of well chosen actions to one’s self, in order to create wealth, and thus survive.
Mark’s quote is probably more accurate and at greater length. I think that Hayek went on to suggest that some of the wealth created went to others with whom the creator interacts, at least in well organized environments.

incipient Hayek discussion?