"He who knows not how to dissimulate, can not reign"

This quote by Louis XI suggests that the capability to camouflage one's true objectives and feelings is an essential ability for a successful ruler. To put it simply, a leader needs to have the ability to conceal their real thoughts and feelings in order to efficiently govern. This is because a ruler must often make decisions that are unpopular or challenging, and should have the ability to do so without revealing their real sensations. Furthermore, a leader should be able to keep a sense of composure and control in order to preserve their authority. By being able to mask their true feelings, a ruler can stay in control of their emotions and the circumstance.

Louis XI's quote also suggests that a leader must be able to control their public image in order to preserve their power. This suggests that a ruler must have the ability to provide themselves in a manner that is favorable to their constituents, while still having the ability to make challenging decisions. A leader should have the ability to appear strong and decisive, while still being able to stay diplomatic and understanding.

Overall, Louis XI's quote recommends that the capability to camouflage one's real intentions and feelings is a vital ability for an effective ruler. A leader must have the ability to keep a sense of composure and control, while likewise being able to control their public image in order to preserve their power. By having the ability to mask their true feelings, a ruler can remain in control of their emotions and the situation.