None would write save under compulsion
The good old Dr Johnson said
Financial compulsion he must have meant
Poor old straitened gentleman

And yet he was afflicted with singularities
He tried to suppress his long life long
Neurological residue of The King’s Evil
Curable only by the monarch’s touch

And so he was no stranger
To compulsion of another kind
Not unknown in our later time
Affliction of psychological etiology

And like his other sagacious claims
This one meant more than he might know
Though more self-aware than most
And given to generalize from the particular

None writes save whom some force compels
Outward state of need or want
Or less observed the inward drive
To repeat repeat and repeat again