I struggle with my weight; it seems to me that this famous verse could well have been written for dieters.

Miss T
It’s a very odd thing –
As odd as can be –
That whatever Miss T. eats
Turns into Miss T.;
Porridge and apples,
Mince, muffins and mutton,
Jam, junket, jumbles –
Not a rap, not a button
It matters; the moment
They’re out of her plate,
Though shared by Miss Butcher
And sour Mr. Bate;
Tiny and cheerful,
And neat as can be,
Whatever Miss T. eats
Turns into Miss T.
– Walter de la Mare. Peacock Pie: A Book of Rhymes (1913)