The Prince by Niccolo Machiavelli Chapter 19 Page 3

For a Prince is exposed to two dangers, from within in respect of his subjects, from without in respect of foreign powers. Against the latter he will defend himself with good arms and good allies, and if he have good arms he will always have good allies; and when things are settled abroad, they will always be settled at home, unless disturbed by conspiracies; and even should there be hostility from without, if he has taken those measures, and has lived in the way I have recommended, and if he never abandons hope, he will withstand every attack; as I have said was done by Nabis the Spartan.

As regards his own subjects, when affairs are quiet abroad, he has to fear they may engage in secret plots; against which a Prince best secures himself when he escapes being hated or despised, and keeps on good terms with his people; and