When Alexis Tsipras meets Angela Merkel today in Brussels, the German leader may like to remind her mythology-loving Greek counterpart of the fate of Pyrrhus. Tsipras won a symbolic victory on Sunday over the German leader, who bet that voters would go against him. But, with banks empty and a humanitarian crisis looming, the Syriza leader might recall Pyrrhus’s remark about the heavy losses his army sustained to beat the Romans: “Victory like that in one more battle and we shall be ruined.” Third Greek bailout could cost...