Some have speculated that the Code of the Sith was created in direct contrast with the Jedi Code, to illustrate the fundamental philosophical differences between the orders. This could certainly account for the first line of the Sith Code discounting the Jedi’s proclamation of peace, as well as the similar structure of the two Codes, although the Jedi claimed the Code spoke only of the Sith’s individual wants and desires.

The Sith Code, as written by Sorzus Syn and taught by Darth Bane:

Peace is a lie, there is only passion.

Through passion, I gain strength.

Through strength, I gain power.

Through power, I gain victory.

Through victory, my chains are broken.

The Force shall free me.

The Sith value power, and use their strength in the Dark Side to increase that power.

Palpatine was the Sith Master who accomplished their 2 main goals: destroying the Jedi Order and gaining control of the galaxy, forming it into an Empire with him at the head.