Why do I panic so much?

There was recently a shipment that needed to be sent to a customer, and I was worried that the shipment would delay or something else would go wrong. I hoped everything would be ok as I didn't want to let any of my customers down.

Nowadays, it is very easy to lose customers but hard to establish a new business relationship. My mother always reminds me not to worry about the things that have not happened, to just try my best at all times.

Although I know my mother is right, it still saddens me when an old customer chooses another supplier, a new supplier gives him or her a much lower price with which I cannot compete, or businessmen in general just go for high profits. I really can't blame them; I can never be the one to offer the lowest price. What I can do, however, is to provide the best service and a quick response. Everything else is beyond my control.