Many demagogues have demonstrated remarkable skill at moving audiences to great emotional depths and heights during a speech. Sometimes this is due to exceptional verbal eloquence, sometimes personal charisma, and sometimes both. Hitler demonstrated both. His eyes had a hypnotic effect on many people, seeming to immobilize and overwhelm whomever he glared at. Hitler usually began his speeches by speaking slowly, in a low, resonant voice, telling of his life in poverty after serving in World War I, suffering in the chaos and humiliation of postwar Germany, and resolving to reawaken the Fatherland. Gradually he would escalate the tone and tempo of his speech, ending in a climax in which he shrieked his hatred of Bolsheviks, Jews, Czechs, Poles, or whatever group he currently perceived as standing in his way—mocking them, ridiculing them, insulting them, and threatening them with destruction. Normally reasonable people became caught up in the peculiar rapport that Hitler established with his audience, believing even the most obvious lies and nonsense while under his spell. Hitler was not born with these vocal and oratorical skills; he acquired them through long and deliberate practice.