No man can exactly calculate the capacity of human genius and stupidity, nor the incapacity of will.
B. H. Liddell HartThe effect to be sought is the dislocation of the opponent's mind and dispositions - such an effect is the true gauge of an indirect approach.
B. H. Liddell HartThe most consistently successful commanders, when faced by an enemy in a position that was strong naturally or materially, have hardly ever tackled it in a direct way. And when, under pressure of circumstances, they have risked a direct attack, the result has commonly been to blot their record with a failure.
B. H. Liddell HartThis high proportion of history's decisive campaigns, the significance of which is enhanced by the comparative rarity of the direct approach, enforces the conclusion that the indirect is by far the most hopeful and economic form of strategy.
B. H. Liddell HartThe most effective indirect approach is one that lures or startles the opponent into a false move - so that, as in ju-jitsu, his own effort is turned into the lever of his overthrow.
B. H. Liddell HartThe more closely [the German army] converged on [Stalingrad], the narrower became their scope for tactical manoeuvre as a lever in loosening resistance. By contrast, the narrowing of the frontage made it easier for the defender to switch his local reserves to any threatened point on the defensive arc.
B. H. Liddell Hart