Suggested replacements:
"Security can only be ensured by the blade, and the willingness to use it."
"The only certain security is a good blade, and the ability to wield it."
"The security of the wielded blade trumps the feeble security of quill and ink."
...and, for the ironic among you:
"Blades don't kill people. Badass ninja assassins wielding blades kill people. Have a nice day."
