brain as most unruly member of organism

The exercise of concentrating the mind (to which at least half an hour a day should be given) is a mere preliminary, like scales on the piano. Having acquired power over that most unruly member of one's complex organism, one has naturally to put it to the yoke. Useless to possess an obedient mind unless one profits to the furthest possible degree by its obedience.

how to live in 24 hours - arnold bennet