Speaking of Quotes from the Early 1800s …
When the enemy is making a false movement we must take good care not to interrupt him.
Second, credited to a French official of the era (though apparently not Talleyrand):
It is worse than a crime, it is a mistake.
Just some multipurpose lines that I've long liked, offered for whatever meaning you might find in them. (As with all such lines, analogies to a current situation are never perfect, and many distinctions can always be drawn; the question is whether there is still enough of a connection to inspire some insight.)