John Wesley on Ecclesiastes 1:8

All things - Not only the sun, and winds, and rivers, but all other creatures. Labour - They are in continual restlessness and change, never abiding in the same state. Is not satisfied - As there are many things in the world vexatious to men, so even those things which are comfortable, are not satisfactory, but men are constantly desiring some longer continuance or fuller enjoyment of them, or variety in them. The eye and ear are here put for all the senses, because these are most spiritual and refined, most curious and inquisitive, most capable of receiving satisfaction, and exercised with more ease and pleasure than the other senses.