Nothing more detestable does the earth produce than an ungrateful man.
That's the trouble with directors. Always biting the hand that lays the golden egg.
Too great a hurry to discharge an obligation is a kind of ingratitude.
We think that we suffer from ingratitude, while in reality we suffer from self-love.
One ungrateful man does an injury to all who stand in need of aid.
Ingratitude is treason to mankind.