Synergy is a powerful force; it is everything in your life moving in the same direction. When your mindset, your emotions, your activity, and your relationships are all moving in the same direction powerful things will happen.
Many facts about the power of confidence are probably worthy of discussion, though these two have impacted me the most: 1) you can fake it till you make it, and 2) it will take you farther than expected.
People become buyers because of how a product and service makes them feel. The best commercials understand this. There is a magnificent commercial by Fisher-Price starring Jon Goodman that reflects this principle.