Air forces offered the possibility of striking a the enemy's economic and moral centres without having first to achieve 'the destruction of the enemy's main forces on the battlefield'. Air-power might attain a direct end by indirect means - hopping over opposition instead of overthrowing it.
The thing about discipline is that people misunderstand the word discipline. People think discipline in the dog world is punishment. Discipline is how you achieve what you want to achieve in life. You have to be very focused, very disciplined, very consistent, very diligent. All of those things.