Apples and Horse Dung were washed down a stream. They mixed together until the Dung thought itself equal to the Apples. It wasn’t.
People will often think more of themselves than warranted.
L’Estrange version
Upon a very great fall of rain, the current carry’d away a huge heap of apples, together with a dunghill that lay in the water-course. They floated a good while together like brethren and companions; and as they went thus dancing down the stream, the horse-turds would be every foot crying out still, Alack a day! How we apples swim!
Moral
Every thing would be thought greater in the world then it is, and the root of it is this, that it first thinks it self so.