“My heart I gave thee, not to do it pain”

My heart I gave thee, not to do it pain;
But to preserve, it was to thee taken.
I served thee, not to be forsaken,
But that I should be rewarded again.
I was content thy servant to remain
But not to be paid under this fashion.
Now since in thee is none other reason,
Displease thee not if that I do refrain,
Unsatiate of my woe and thy desire,
Assured by craft to excuse thy fault.
But since it please thee to feign a default,
Farewell, I say, parting from the fire:
For he that believeth bearing in hand,
Plougheth in water and soweth in the sand.