Action is movement with intelligence. The world is filled with movement. What the world needs is more conscious movement, more action. Yoga teaches us how to infuse our movements with intelligence, transforming them into action. In fact action that is introduced in an asana should excite the intelligence, whereas normally the mind gets caught and excited in motion alone.
There should be constant analysis throughout the action, not just afterward. This leads to true understanding. The real meaning of knowledge is that action and analysis synchronize. Slow motion allows reflective intelligence. It allows our minds to watch the movement and leads to a skillful action. The art of yoga lies in the acuity of observation. -- Light on Life, BKS Iyengar