Still, to slaughter fellow-citizens, to betray friends, to be devoid of honour, pity, and religion, cannot be counted as merits, for these are means … - Niccolò Machiavelli

There is no avoiding war, it can only be postponed to the advantage of your enemy.

Men are so self-complacent in their own affairs, and so willing to deceive themselves, that they are rescued with difficulty from this pest. If they wish to defend themselves they run the risk of becoming contemptible.

A Prince is likewise esteemed who is a stanch friend and a thorough foe, that is to say, who without reserve openly declares for one against another, this being always a more advantageous course than to stand neutral. For supposing two of your powerful neighbours come to blows, it must either be that you have, or have not, reason to fear the one who comes off victorious. In either case it will always be well for you to declare yourself, and join in frankly with one side or other. For should you fail to do so you are certain, in the former of the cases put, to become the prey of the victor to the satisfaction and delight of the vanquished, and no reason or circumstance that you may plead will avail to shield or shelter you; for the victor dislikes doubtful friends, and such as will not help him at a pinch; and the vanquished will have nothing to say to you, since you would not share his fortunes sword in hand.