The Yoga Sutras of Pantajali (Book Two Chapter 46) 300BC

Asana is a steady, comfortable posture. Asana (yoga posture) means the posture that brings comfort and steadiness. Any pose that brings this comfort and steadiness is a yoga asana. If you can achieve one pose, that is enough. It may sound easy, but in how many poses are we really comfortable and steady? Before we can relax the mind and bring more balance into our lives we need to work on the physical body by using yoga practices such as posture work and breath control.

T.K.V Desikachar

Anybody can breathe. Therefore anybody can practice yoga

Yoga Sutras 1.20

The path of yoga requires faith, energy, mindfulness, meditation and wisdom.

Sri. K. Pattabhi Jois

Body is not stiff, mind is stiff

Hatha Yoga Pradipika

One who practices can can obtain success in yoga but not one who is lazy. Constant practice is the secret of success.

Awakening the Spine (Scaravelli)

‘To teach yoga is also a responsibility….is not meant to be used for personal or egoistic purposes, but for other peoples sake…’