I remember a police chief over fifty years ago saying he feared knives more than guns because...”The knife is always loaded!”
Damn straight. What my late sensei taught me. You can get creative with a knife, keep it hid, whip it out, slash, and then hide it again, have the poor sap wondering how he came to be bleeding while you slash him again, hit arteries with precision. My late sensei was a real sick dude.