拜托英语高手们帮我详细分析一下此句的成分,还有句子的意思.
Do not his powers fail when he most requires their use?And whether he soar in joy,or sink in sorrow,is not his career in both inevitably arrested?And,whilst he fondly dreams that he is grasping at infinity,does he not feel compelled to return to a consciousness of his cold,monotonous existence?