The body is my temple and asanas are my prayers. While practicing asanas, learn the art of prayers. When your posture is imbalanced, the practice is physical; balanced asanas lead to spiritual practice. As a goldsmith weighs gold, you have to adjust your body so that it is as pearls are held on a thread all the limbs should be held on the thread of intelligence. If your body can do more and you do not do it, that is unethical practice. Ethical discipline of the asana is when you extend correctly, evenly and to the maximum.
The brain is the hardest part of the body to adjust in asanas. If the brain is silent but attentive while performing asanas, your practice is nonviolent.