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Ingratitude is treason to mankind
Ingratitude is treason to mankind
 Ingratitude! thou marble-hearted fiend,
 More hideous when thou show'st thee in a child
  Than the sea-monster.  
 Ingratitude! thou marble-hearted fiend,
 More hideous when thou show'st thee in a child
  Than the sea-monster. 
Ingratitude is the essence of vileness.
Ingratitude is the essence of vileness.
 One ungrateful man does an injury to all who are suffering.
 [Lat., Ingratus unus miseris omnibus nocet.]  
 One ungrateful man does an injury to all who are suffering.
 [Lat., Ingratus unus miseris omnibus nocet.] 
What, wouldst thou have a serpent sting thee twice?
What, wouldst thou have a serpent sting thee twice?
 Earth produces nothing worse than an ungrateful man.
 [Lat., Nil homine terra pejus ingrato creat.]  
 Earth produces nothing worse than an ungrateful man.
 [Lat., Nil homine terra pejus ingrato creat.] 
Ingratitude is monstrous
Ingratitude is monstrous
 A man is very apt to complain of the ingratitude of those who 
have risen far above him.  
 A man is very apt to complain of the ingratitude of those who 
have risen far above him. 
 He is ungrateful who denies that he has received a kindness which 
has been bestowed upon him; he is read more 
 He is ungrateful who denies that he has received a kindness which 
has been bestowed upon him; he is ungrateful who conceals it; he 
is ungrateful who makes no return for it; most ungrateful of all 
is he who forgets it.
 [Lat., Ingratus est, qui beneficium accepisse se negat, quod 
accepit: ingratus est, qui dissimulat; ingratus, qui non reddit; 
ingratissimus omnium, qui oblitus est.]