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.
Seneca the YoungerThe mind is a matter over every kind of fortune; itself acts in both ways, being the cause of its own happiness and misery.
Seneca the Younger