In ancient Japan, one of the most honored yet intensely competitive craftsmen were the makers of Samurai Swords. A fine craftsman was not just technically skilled, but also had a deep spiritual background, as the sword served as an extension of the warrior's honor and spirit.
History tells of a great competition to determine who was the master swordmaker in the land.
The competition came down to two famous smiths, Muramasa and Masamune. The leaves approaching the blade of Masamune passed by either side uncut. Based on pure cutting ability one might think a sword able to cut leaves in two with just the slight power of the water's current. The true winner, however, was the sword that allowed the leaves to pass unharmed. It was said Masamunes's sword had spiritual discernment.