Yoga is frequently reduced to posture. This reduction is historically inaccurate.
In the Vedic tradition, Yoga refers to disciplined integration of the human system — body, breath, mind, and awareness.
The word “Yoga” derives from the root yuj, meaning union, yoking, or integration. It implies alignment rather than performance.
In the Katha Upanishad, Yoga is described as mastery over the senses and steadiness of the mind. The Upanishad compares the body to a chariot, the senses to horses, the mind to reins, and the intellect to the charioteer. Without disciplined control, the chariot moves erratically. With mastery, it reaches its destination.
Yoga, therefore, is governance of the inner instrument.
It is not primarily physical flexibility. It is an internal order.