These are the five keys to victory:
Knowing if a buyer is a qualified, and who is not.
Knowing what to do when the competition is superior, and when they’re not.
Knowing the value you bring and how to share the relevance of that value with clarity.
Knowing the sales process and following it with discipline.
Knowing that the responsibility of making sales lies wholly on you.
Thus the Master Seller teaches if you know yourself and you know your prospects you will make sales. If you know yourself and not your prospects you will lose many sales. And if you know neither yourself nor your buyers you will lose all sales.
Knowing is success.
The Tao Te Ching of Sales 