'What is Man' in the Bible

What is man, that you should magnify him? and that you should set your heart upon him?

What is man, that he should be clean? and he who is born of a woman, that he should be righteous?

What is man, that you are mindful of him? and the son of man, that you visit him?

LORD, what is man, that you take knowledge of him! or the son of man, that you make account of him!

But one in a certain place testified, saying, What is man, that you are mindful of him? or the son of man, that you visit him?