'Able' in the Bible

Who is able to say, I have made my heart clean, I am free from my sin?

If you have honey, take only as much as is enough for you; for fear that, being full of it, you may not be able to keep it down.

Like a dog going back to the food which he has not been able to keep down, is the foolish man doing his foolish acts over again.

The hater of work seems to himself wiser than seven men who are able to give an answer with good sense.

Who has gone up to heaven and come down? who has taken the winds in his hands, prisoning the waters in his robe? by whom have all the ends of the earth been fixed? what is his name, and what is his son's name, if you are able to say?