Once a chassid stood contemplating the minyan (prayer quorum) his rebbe had assembled to pray on behalf of a sick man.

The chassid was upset. The quorum included ruffians, burglars and other people of ill repute. The chassidic master felt his disciple's discomfort, and explained to him:

"We need these people in our minyan. When you need to open the gates of Heaven, you had better get help from experts....!"