The implications are that formal logic grew-out of human religious thinking, as the understanding of the world developed over long periods of time. In India, for instance the Buddha reformed Brahmanism into a new and logical philosophy that emphasised the detailed assessment of human perception existing within a physical world.
This tension ‘stiffens’ the leg muscles and makes them very difficult to stretch or loosen. To remedy this situation, spend time loosening the lower back muscles.
That is pain, which seems to be a very important issue for human beings. As for myself, I am certainly not immune to pain, but am not interested in it. Yes pain happens from time to time, but as it is passing, I am aware that it is not permanent. In this respect I am lucky because many people suffer all the time and never have a break from the experience. I would say that life is mostly a neutral experience with outbreaks of pleasure and pain from time to time.