It is better to do thine own duty, however lacking in merit, than to do that of another, even though efficiently. It is better to die doing ones own duty, for to do the duty of another is fraught with danger. – Bhagavad Gita
Pour some water into a tub and stir it up. Now try as hard as you can to calm the water with your hands; you will succeed in agitating it further. Let it stand undisturbed a while, and it will calm down by itself. The human brain works much the same way. – Koichi Tohei, Ki in Daily Life