The one constant in life is change. No matter the status quo or how great the plan, one can almost guarantee that something will come along to alter that status quo, or bump that great plan of course.
The one big reason for being able to say that change is inevitable with such confidence is the fact that, even with all of the technology and understanding in the world, the future cannot be predicted. Doppler radar and experienced meteorologists can track and model disastrous weather patterns, but cannot specifically tell how badly they will hit and what damage they will do. More importantly, we can’t stop it from happening. The best, and really only, thing we can do is prepare.