Nothing more detestable does the earth produce than an ungrateful man.
- Decimus Magnus Ausonius
Everybody takes pleasure in returning small obligations; many go so far as to knowledge moderate ones; but there is hardly any one who does not repay great obligations with ingratitude.
- Francois Duc de la Rochefoucauld
The wicked are always ungrateful.
- Cervantes (Miguel de Cervantes Saavedra)
Ingratitude is always a kind of weakness. I have never seen that clever men have been ungrateful.
- Johann Wolfgang von Goethe
Blow, blow, thou winter wind,
Thou art not so unkind
As man’s ingratitude:
Thy tooth is not so keen,
Because thou art not seen,
Although thy breath be rude.
- William Shakespeare, As You Like It
(Amiens at II, vii)
Ingratitude is monstrous; and for the multitude to be ingrateful were to make a monster of the multitude; of which we being members, should bring ourselves to be monstrous members.
- William Shakespeare, Coriolanus
(Third Citizen at II, ii)