It's important to have a short and simple explanation for the purpose of your business. It's to give you focus, help you explain what you're doing to other people, and relate back to when making defining choices. However, this doesn't mean the statement can't or should not change. Your mission statement probably will and should change. It's very rare a business starts out with it's creator(s) knowing exactly what problem they are solving and how they are solving it-- business is discovery, trying, failing, and succeeding. You'll probably do all of those a little, and it's important to take what you learn and culture your business, goals, and mission around it!

Avery and I started-out with a mission statement similar to "selling great products that pay for themselves". We're in the process of determining if this should be changed to something more specific, perhaps making reference to energy or conservation or efficiency. Or, maybe we will totally re-evaluate and carefully think about a totally different direction. As we do research on products to sell, think about how to market and sell products, determine our market, etc. it's possible we'll pull another idea out of our hat and aim for that instead.

No matter what we do, though, our mission statement will change to reflect it so that we both stay focused on the overall goal of this brothers business.