Yes, flexibility of body and physical perfection for Yogasana is important. However more important is the state of your mind, Meditative mind. Your flexibility might be excellent but if your mind is not attentive, you are merely doing some physical exercise, not Yoga.

We can rise above our limitations, only once we recognize them.

Penetration of our mind is our goal, but in the beginning to set things in motion, there is no substitute for sweat.

Ignorance has no beginning, but it has an end. There is a beginning but no end to knowledge.

It is never too late in life to practice yoga

Practice doing yoga with an innocent mind. Then, you will be able to cognize the things happening in your body

The body has to be invaded by the intelligence; each part has to become intelligent.