'Man's' in the Bible

The wise man's eyes are in his head, and the fool walks in darkness -- and yet I perceived that one event happens to them all.

Then I saw all the labor and achievement that is the envy of a man's neighbor. This also is vanity and a striving after wind.

Who is like the wise man? And who knows the interpretation of a thing? A man's wisdom makes his face shine, and the hardness of his face is changed.

Then I said, "Wisdom is better than strength." Nevertheless the poor man's wisdom is despised, and his words are not heard.

A wise man's heart is at his right hand, but a fool's heart at his left.

The words of a wise man's mouth are gracious; but a fool is swallowed by his own lips.