Starting a project with a good plan is like mapping out the course your project will take. A good plan tells you which direction to go, what turns to take, and what to do if you run into a bump that causes you to take a detour. Regardless of the size, type or duration of a project, a good plan will guide you from beginning to end and it will help increase the likehood that your project will be successfully managed and completed.
Where did you copy these words from? It's sounds reasonable but with no meaning. Anyway, these are good saying. Hope to see more topic on Project planning. Infect, only few people konws professional project planning in China at the moment.