That which strengthens the enemy also strengthens ourselves,... - Selim I

"That which strengthens the enemy also strengthens ourselves, if we use it wisely."

Selim I

Military Sultan Ottoman 1470–1520

More from Selim I

"The conquest of Constantinople is the conquest of the world."

"A ruler must be swift in decision and firm in execution."

"The sword is the language of kings."

"To rule is to serve those beneath you."