“In art, self-discipline and right application in effort act as the two wings of the artist by which he rises to lofty heights. Effort is the propelling force which spurs one with the power of will and strength to start on one’s chosen art. It is an energetic endeavor to combat weaknesses, moods and pessimism. Effort is of two types, mechanical and dynamic. Mechanical involvement is repetitious; it is habit forming and brings some mobility but no enlightenment. Dynamic effort is total, signifying a single-minded and intense approach.”
—Yogacharya BKS Iyengar, Art of Yoga, p. 27.