Von Molkte: No plan of operations extends with certainty beyond the first encounter with the enemy's main strength which is often stated as no battle plan survives contact with the enemy.
In S1 E2 MacLaren says no plan survives contact with the past. Von Moltke tried to form several plans or even create an entirely new one when conditions change. Philip talks about Von Moltke in SS1 E5 after the unknown guy gives him heroin and he is in front of the TV set again.