I have always been told that unless you have a far superior position, you do not want to grab the knife hand. Once you grab the knife hand, their automatic reaction will be to jerk back, which will result in you getting cut across the hand and possibly incapacitating one of your defensive weapons.
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Behold, I see my father and mother.
I see all my dead relatives seated.
I see my master seated in Paradise and Paradise is beautiful and green; with him are men and boy servants.
He calls me. Take me to him.