Human beings are curious by nature.
We can't learn without pain.
A king ruleth as he ought, a tyrant as he lists, a king to the profit of all, a tyrant only to please a few.
A likely impossibility is always preferable to an unconvincing possibility.
And of course, the brain is not responsible for any of the sensations at all. The correct view is that the seat and source of sensation is the region of the heart.
In order to be effective you need not only virtue but also mental strength.