When you add a goal to the enjoyment of what you do, the energy-field or vibrational frequency changes. A certain degree of what we might call structural tension is now added to enjoyment, and so it turns into enthusiasm. At the height of creative activity fueled by enthusiasm, there will be enormous intensity and energy behind what you do. You will feel like an arrow that is moving toward the target—and enjoying the journey.

Eckhart Tolle

from A New Earth: Awakening to Your Life's Purpose