Too late to edit my comment, but on 2nd thought I'd prefer to pivot from the violent connotations of swinging a sword to something more peaceful. Armor might be

Too late to edit my comment, but on 2nd thought I'd prefer to pivot from the violent connotations of swinging a sword to something more peaceful. Armor might be a closer metaphor... but that implies a closing-off from the world which is the opposite of what mindfulness brings. So I'll give up on the tortured metaphors here for now. :)