This text comes from Songs of Innocence and of Experience (1826), a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Love seeketh not Itself to please,
Nor for itself hath any care;
But for another gives its ease,
And builds a Heaven in Hells despair.
So sang a little Clod of Clay,
Trodden with the cattles 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 anothers loss of ease,
And builds a Hell in Heavens despite.