From "Why Meditate"

No change occurs if we just let our habitual tendencies and automatic patterns of thought perpetuate and even reinforce themselves, thought after thought, day after day, year after year. But those tendencies and patterns can be challenged.
…..How could it (the mind) be subject to change without the least effort, just from wishing alone? That makes no more sense than expecting to play a Mozart Sonata by just occasionally doodling around on the piano.