No man can exactly calculate the capacity of human genius and stupidity, nor the incapacity of will.

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.

For the spread and endurance of an idea the originator is dependent on the self-development of the receivers and transmitters.

For even the best of peace training is more theoretical than practical experience ... indirect practical experience may be the more valuable because infinitely wider.

In reality, it si more fruitful to wound than to kill. While the dead man lies still, counting only one man less, the wounded man is a progressive drain upon his side.

Inflict the least possible permanent injury, for the enemy of to-day is the customer of the morrow and the ally of the future

For if we merely take what obviously appears the line of least resistance, its obviousness will appeal to the opponent also; and this line may no longer be that of least resistance. In studying the physical aspect, we must never lose sight of the psychological, and only when both are combined is the strategy truly an indirect approach, calculated to dislocate the opponent's balance.