It's all part of the process. However, if you perceive the initial negatives as personal rejections, you are less likely to be persistent. You may even give up. Some people need more than just that reframing phrase, however. For these people, tapping is in order.
Perceived rejection is one of the most expensive emotions any salesperson can have.
Show a corporation how to eliminate or reduce the fear of rejection for their salespeople and you will make a big impression. Corporations think this way. Get contracts signed. Get a reputation. Chances are, it is those past issues that need to be EFT'd.