Hallo Hans! Wie geht es? Hello to the rest of you too.
> If this to use the flat, o.k. use the flat, if this is to use the edge, o.k. use the
> edge. So what?
>
> I have never seen written in the manuals: “Only use the flat of your blade
> for displacing.”
>
> and
>
> I have also never seen written in the manuals: “Only use the edge of your
> blade for displacing “
You are exactly right, there is no issue. You use what is right for the task at hand. Some of the elements are with the edge, others the flat, some void altogether, and in some you throw your sword away and end up in a grapple. It all depends on the situation.
An allusion was made to a certain Italian video, I believe I have a copy as well. What you see there is not displacing, it is blocking and, yes, their blades are very notched and saw toothed, no surprise. If all you do is block the attack, then I don't care what you use, flat or edge, a block does nothing but keep you in the nach. Your Meyer quote says that quite plainly.
A sword that just blocks absorbs all of the kinetic energy of the oncoming attack. This is where notched and broken blades come from. A redirection or deflection, be it with flat or edge, redirects that energy without absorbing it all into the sword and swordsman. This is partially why the longsword masters said that parries which do nothing more than block are next to useless.
If you apply the master principles and, when parrying, always try to deflect and counter, not block, the whole issue is moot. There are principles for every aspect of the weapon. After all, the master strikes are neither offensive nor defensive, they are both and represent the five main principles of displacement.
With that in mind, flat versus edge in parrying, particularly with longsword, is a pointless (sic) argument. There are too many dynamics of displacing, redirection, and deflection to state that one element is the best element. In fact if you bog yourself into a preconceived mindset that "this is the way" and all others are cr*p, you risk missing the lessons the masters taught.
It is far too early in the game to entrench ourselves into closed, static, unbending mindsets. Let's try to keep our minds open. We'll learn more that way.
-M