The most important rule in the success of a business

Success and business

Today I was thinking about the most important rule in business.  well what is the most important rule in business from your point of view? or let me to put it in another way, what you need to learn to be successful in business?
 Think about it for some minutes then high light the answer  in coming lines.

The most important rule in business is  RESPECT my friends.

Learn to respect to yourself and your customers. Look at business world and see the most important figures .  They all are respectable people. They have their own personal disciplines and they respect to customers they offer more value at less cost and provide the best service they are capable of.  They don't expect customers to bring benefit for them they all are trying to provide benefit for clients. The art and the hard part of business is this to try hard and think smart to do so and this comes from the rule of respect.