The war against Russia will be such that it cannot be conducted in a knightly fashion. This struggle is one of ideologies and racial differences and will have to be conducted with unprecedented, unmerciful and unrelenting harshness.
Mankind are in the end always governed by superiority of intellectual faculties, and none are more sensible of this than the military profession. When, on my return from Italy, I assumed the dress of the Institute, and associated with men of science, I knew what I was doing: I was sure of not being misunderstood by the lowest drummer boy in the army.
Air power can either paralyze the enemy's military action or compel him to devote to the defense of his bases and communications a share of his straitened resources far greater that what we need in the attack.
What are the conditions that make for the superiority of an army? Its internal organization, military habits in officers and men, the confidence of each in themselves; that is to say, bravery, patience, and all that is contained in the idea of moral means.
When it comes to preventing Iran from obtaining a nuclear weapon, I will take no options off the table. ... That includes all elements of American power: a political effort aimed at isolating Iran, a diplomatic effort to sustain our coalition and ensure that the Iranian program is monitored, an economic effort that imposes crippling sanctions and, yes, a military effort to be prepared for any contingency.
America must always lead on the world stage. If we don't, no one else will. The military that you have joined is, and always will be, the backbone of that leadership. But U.S. military action cannot be the only - or even primary - component of our leadership in every instance. Just because we have the best hammer does not mean that every problem is a nail.
The essential factor of military success is speed, that is taking advantage of others' unpreparedness or lack of foresight, their failure to catch up, going by routes they do not expect, attacking where they are not on guard. This you cannot accomplish with hesitation.