“Begin with the end in mind” is a full sentence. It’s not “figure out your goal, where you want to end up.” It’s not “just do it!”. It’s the idea of both figuring out your “end”, and how you might get there.
Begin each day, task, or project with a clear vision of your desired direction and destination, then continue by practicing Habit #1 (Be Proactive!).
What is a “Personal Mission Statement” and why should we consider one?
The Seven Habits of Highly Effective People (the book)