To know rhythm one must develop the sense of rhythm. How readily one notices it when one has a little pain! This shows that a person intuitively knows the effect of rhythm. For instance sometimes a congestion causes illness; but what is congestion and what can it do? It is something which stops the rhythm. The rhythm with which the blood was circulating is stopped by congestion; that is why illness came. By being regular one maintains rhythm in everything one does, and an irregular person will always find himself lost, because he cannot accomplish anything for want of rhythm.