Action is movement with intelligence
Hard work and humility are essential for spiritual sadhana.
Freedom in a posture is when every joint is active.
Firmness in the body leads to firmness in the nervous system.
In whatever position one is in, or in whatever condition in life one is placed, one must find balance. Balance is the state of the present - the here and now. If you balance in the present, you are living in Eternity.
Your whole being should be symmetrical. Yoga is symmetry. That is why yoga is a basic art.