I think what gets you through a small writing project, is just one burst of inspiration. A book, especially a longer book, it's a different kind of force that pushes you through it. It's a vision of the whole thing.
The power of meditation gets us everything. If you want to get power over nature, [you can have it through meditation]. It is through the power of meditation all scientific facts are discovered today. They study the subject and forget everything, their own identity and everything, and then the great fact comes like a flash.