The Japanese Emperor is seeking a new Samurai.
There are three foreign candidates for the job, a Hindu, a Christian and a Jew.
The Emperor releases a fly, and the Hindu immediately takes his sword and divides the fly into two pieces.
The Emperor cheers.
He releases another fly, and the Christian is able to divide the fly into four pieces. The Emperor is gobsmacked.
Now, it's the Jew's turn.
The Emperor releases the fly. And the Jew swings his sword four times, but virtually fails to kill the insect.
The Emperor is deeply disappointed.
The Jew:"Relax, Your Majesty - I didn't kill the fly but circumcised it!"