In learning to play the piano, both hands have to be taught, each one to play independently of the other.
At the same time, they have to play in harmony, in absolute coordination.
For one hand to play its own music would be disharmony, wrongness.
In other words, the freedom allowed to man to determine his own essence is like the independence accorded to the hand to play its own music, even though without coordination there is no harmony, no rightness of execution.
Our freedom to do as we choose is also the freedom to err, to get out of rhythm and to do the wrong thing.
–Rabbi Adin Steinsaltz