I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.
Commerce has set the mark of selfishness, the signet of its all-enslaving power, upon a shining ore, and called it gold: before whose image bow the vulgar great, the vainly rich, the miserable proud, the mob of peasants, nobles, priests, and kings, and with blind feelings reverence the power that grinds them to the dust of misery.
Since everything in nature answers to a moral power, if any phenomenon remains brute and dark, it is that the corresponding faculty in the observer is not yet active.
The analytical power should not be confounded with simple ingenuity; for while the analyst is necessarily ingenious, the ingenious man is often remarkably incapable of analysis.
Not necessity, not desire - no, the love of power is the demon of men. Let them have everything - health, food, a place to live, entertainment - they are and remain unhappy and low-spirited: for the demon waits and waits and will be satisfied.
Power, from the standpoint of experience, is merely the relation that exists between the expression of someone's will and the execution of that will by others.