Niccolò Machiavelli
https://en.wikipedia.org/wiki/Niccol%C3%B2_Machiavelli
He who, blinded by ambition, raises himself to a position whence he cannot mount higher, must thereafter fall with the greatest loss.
If an injury has to be done to a man it should be so severe that his vengeance need not be feared.
Whoever desires to found a state and give it laws, must start with assuming that all men are bad and ever ready to display their vicious nature, whenever they may find occasion for it.
A prince should therefore have no other aim or thought, nor take up any other thing for his study but war and it organization and discipline, for that is the only art that is necessary to one who commands.
He who has not first laid his foundations may be able with great ability to lay them afterwards, but they will be laid with trouble to the architect and danger to the building.
Men judge generally more by the eye than by the hand, for everyone can see and few can feel. Every one sees what you appear to be, few really know what you are.
Since love and fear can hardly exist together, if we must choose between them, it is far safer to be feared than loved.
There is no other way of guarding oneself against flattery than by letting men understand that they will not offend you by speaking the truth; but when everyone can tell you the truth, you lose their respect.
When neither their property nor their honor is touched, the majority of men live content.
There are three classes of intellects: one which comprehends by itself; another which appreciates what others comprehend; and a third which neither comprehends by itself nor by the showing of others; the first is the most excellent, the second is good, and the third is useless.
There is nothing more difficult to take in hand, more perilous to conduct or more uncertain in its success than to take the lead in the introduction of a new order of things.
War is a profession by which a man cannot live honorably; an employment by which the soldier, if he would reap any profit, is obliged to be false, rapacious, and cruel.
Ambition is so powerful a passion in the human breast, that however high we reach we are never satisfied.
War cannot be avoided; it can only be postponed to the others advantage.
...it is a base thing to look to others for your defense instead of depending upon yourself. That defense alone is effectual, sure, and durable which depends upon yourself and your own valor.