Chaos Theory and the practice of yoga

On Thursday evening I watched a fascinating programme on BBC4 about Chaos Theory. I learnt that biological systems follow simple mathematical formula but that unpredictable things occur as a result of variations in the starting point. Some variations are useful and so persist while others are not so useful and become extinct i.e. the system evolves.
We can see chaos theory in our yoga practice. The body is different today from how it was yesterday and from how it will be tomorrow. It may be stiff or injured, it may be affected by what we've eaten or drunk or by the environment around us or it may be under attack from viruses. When we move into a posture we are, in effect, doing it as if for the first time because nothing is exactly as it was before. As a result we cannot know exactly what will happen.
Let us take uttanasana as an example. Uttanasana is a standing forward bend. A standing forward bend not the standing forward bend. The label tells us nothing about the movement other than give some indication as to what its not. It's not a backbend, a twist or standing on the head. We do the forward bend as we are and it is never the same because we are never the same. Knowing this if we pay attention each time we do a standing forward bend we may discover something new about forward flexion and about ourselves. Then both we and the posture can evolve.