'Hard' in the Bible

Yes, the Lord has this to say to the people of Judah and Jerusalem: "Like a farmer breaking up hard unplowed ground, you must break your rebellious will and make a new beginning; just as a farmer must clear away thorns lest the seed is wasted, you must get rid of the sin that is ruining your lives.

I reported, "All of them are the most stubborn of rebels! They are as hard as bronze or iron. They go about telling lies. They all deal corruptly.

Oh, Lord God, you did indeed make heaven and earth by your mighty power and great strength. Nothing is too hard for you!