On Think and Grow Rich by Napoleon Hill - Chapter 6: Imagination, The Workshop Of The Mind

You can create anything that you can imagine. Reach your desires through imagination. Success requires no explanations. Activate your creative imagination.

Imagination works automatically when activated. Your creative and synthetic imagination is where you formulate new ideas and plans of action mixed with what you already know, to reach any goal or desire you may have. Most of us use it without thinking on everyday tasks.