The 3 tenets. Live them and die by them.
take them to your grave
Stay your blade from the flesh of an innocent
"I would not have drawn attention to us. I would not have taken the life of an innocent."
―Malik Al-Sayf
Hide in plain sight
"Let the people mask you such that you become one with the crowd."
―Al Mualim.[src]
Be unseen. The Assassins' aim was to get close to their target stealthily, and escape just as quickly.
Never compromise the Brotherhood
"Your actions must never bring harm upon us – direct or indirect!"
―Al Mualim.[src]