If I were not Alexander, I should wish to be Diogenes. - Alexander the Great

Know ye not that the end and object of conquest is to avoid doing the same thing as the conquered?

Your ancestors came to Macedonia and the rest of Hellas [Greece] and did us great harm, though we had done them no prior injury. I have been appointed leader of the Greeks, and wanting to punish the Persians I have come to Asia, which I took from you.

Our enemies are Medes and Persians, men who for centuries have lived soft and luxurious lives; we of Macedon for generations past have been trained in the hard school of danger and war. Above all, we are free men, and they are slaves. There are Greek troops, to be sure, in Persian service — but how different is their cause from ours! They will be fighting for pay — and not much of at that; we, on the contrary, shall fight for Greece, and our hearts will be in it. As for our foreign troops — Thracians, Paeonians, Illyrians, Agrianes — they are the best and stoutest soldiers in Europe, and they will find as their opponents the slackest and softest of the tribes of Asia. And what, finally, of the two men in supreme command? You have Alexander, they — Darius!