The master asked the novice: “What should be prefered? A shower with one knob, or a shower with two knobs?”
“The one with two knobs, of course, because it allows for greater diversity during showering.”, the novice responded.
“Then you shalt receive the shower with two knobs: One knob for too hot water, and the other one for too cold water.”, the master said.
Upon hearing this, the novice was enlightened.
NP: Bob Dylan—Someone’s Got A Hold Of My Heart