In the days of primitive tribes and grass huts, there was one tribe which was very warlike. They won many battles, and took control of many other tribes. One of their customs was to take the most prized posession of the enemy's chief.
After a particularly fierce battle, they defeated a rich tribe whose king had a prized solid gold throne.
They seized the throne, and put it in the loft of their cheif's house. Unfortunately, the throne was much too heavy to be kept in the loft of a grass house, and it fell right through the ceiling, onto the cheif, killing him instantly.
This my friends, is the reason we have the old adage of self critique: ... People Who Live in Grass Houses Shouldn't Stow Thrones!