" I haven't lost an arm, brother. It's right over there." — Captain Alessio Cortez, Crimson Fists

"Knowledge is power. Guard it well." — Motto of the Blood Ravens Chapter

"They shall be my finest warriors, these men who give of themselves to me. Like clay I shall mould them, and in the furnace of war forge them. They will be of iron will and steely muscle. In great armour shall I clad them and with the mightiest guns will they be armed. They will be untouched by plague or disease, no sickness will blight them. They will have tactics, strategies and machines so that no foe can best them in battle. They are my bulwark against the Terror. They are the Defenders of Humanity. They are my Space Marines and they shall know no fear."
– on the Creation of the Space Marines.

"The warrior who acts out of honour cannot fail. His duty is honour itself. Even his death - if it is honourable - is a reward and can be no failure, for it has come through duty. Seek honour as you act, therefore, and you will know no fear."
— Primarch Roboute Guilliman