"Love seeketh not itself to please
Nor for itself hath any care
But for another gives its ease
And builds a heaven in hell's despair."
So sung a little Clod of Clay
Trodden with the cattle's feet
But a Pebble of the brook
Warbled out these metres meet:
"Love seeketh only Self to please
To bind another to its delight
Joys in another's loss of ease
In the folk tradition of  answer songs , the proposition by the Clod in Verse 1 is replied to by the Pebble in Verse 3. Answer songs are generally from the opposite point of view. For example, from a woman to a man where the original was sung to the woman by the man. 
 The Clod is described as “trodden with cattle’s feet”, giving an impression that it is malleable, and in reality easily manipulated by those with whom it has a relationship. 
 On the contrary, the Pebble lays at the bottom of the brook, and being a hard stone, does not let others control it in a relationship, rejecting most manipulation, with its unchangeable shape. 
 Note that ‘meet’ here is an archaic word meaning suitable or appropriate.
The Clod and the Pebble