'Difficult' in the Bible

Elijah replied, "That's a difficult request! If you see me taken from you, may it be so, but if you don't, it will not happen."

His servants approached and said to him, "O master, if the prophet had told you to do some difficult task, you would have been willing to do it. It seems you should be happy that he simply said, "Wash and you will be healed."