Pre-thanksgiving thoughts on what are the effects of ingratitude.

I have an old book called “Poems Every Child Should Know.”
The school teacher who compiled it includes teacher’s notes before some of them. These notes were positively broadminded about what constitutes a “proper” education as indicated by the note below that precedes Shakespeare’s piece on ingratitude.
——
Blow, blow, thou winter wind,
Thou are not so unkind
As man’s ingratitude;
Thy tooth is not so keen
Because thou are not seen,
Although thy breath be rude.

Freeze, freeze, thou bitter sky,
Thou dost not bite so nigh
As benefits forgot;
Though thou the waters warp,
Thy sting is not so sharp
As friend remembered not.

— William Shakespeare