I'm going to be meeting with people today who talk too much - people who are selfish, egotistical, ungrateful. But I won't be surprised or disturbed, for I can't imagine a world without such people.
— Marcus Aurelius
Contentment Ungrateful People quotations
All happy people are grateful. Ungrateful people cannot be happy. We tend to think that being unhappy leads people to complain, but it’s truer to say that complaining leads to people becoming unhappy.

One ungrateful person, does an injury to all needy people.

Ungrateful people breed negativity. No one gets any pleasure from giving to an ungrateful person. When you show appreciation, the object of your attention blossoms and flourishes.
Even though many people prove to be ungrateful, do not let that stop you from benefiting others-for not only is beneficence in itself a noble and almost divine quality, it may also happen that while you practice it, you will encounter someone so grateful that he will make up for all the others' ingratitude.
Ungrateful people forget what they are not grateful for.

There's a basic human weakness inherent in all people which tempts them to bitterly want what they can't have and ungratefully not want what is readily available to them.
It is no tragedy to do ungrateful people favors, but it is unbearable to be indebted to a scoundrel.
God gave us minds to think with and hearts to thank with.
Instead we use our hearts to think about the world as we would like it to have been, and we use our minds to come up with rationalizations for our ingratitude. We are a murmuring, discontented, unhappy, ungrateful people. And because we think we want salvation from our discontents.

It is no great misfortune to oblige ungrateful people, but an unsupportable one to be forced to be under an obligation to a scoundrel.
I wouldn't have become an engineer, I wouldn't have done what I did, had a hand not been held out to me. I have to remember who helped me when I needed help. The people of Jamaica helped me. I can't forget that. I would be ungrateful if I forgot.
Gratitude turns what we have into enough.

We seldom find people ungrateful so long as it is thought we can serve them.
There is no greater difference between men than between grateful and ungrateful people.
A Negro who does not vote is ungrateful to those who have already died in the fight for freedom. ... Any person who does not vote is failing to serve the cause of freedom - his own freedom, his people's freedom, and his country's freedom.

Virtue is not always where it seems to be.
People sometimes acknowledge favors only to maintain their reputations, and to make themselves more impudently ungrateful for favors that they do not wish to acknowledge.
As you get older and wiser you realize that when people are given anything without having to earn it (unless they are physically or mentally utterly incapable of earning anything), they become ungrateful and lazy. They also become less happy.
People who see an unhappy, sulky pop star assume that she's an ungrateful, self-absorbed little ninny. But nobody knows what's really going on. I need to eat, I need to sleep, and sometimes those things weren't considered. It was like, "When do you think I'll have time to go to the bathroom?" That wasn't on the schedule.

Some punishment seems preparing for a people who are ungratefully abusing the best constitution and the best King any nation was ever blessed with, intent on nothing but luxury, licentiousness, power, places, pensions, and plunder; while the ministry, divided in their counsels, with little regard for each other, worried by perpetual oppositions, in continual apprehension of changes, intent on securing popularity in case they should lose favor, have for some years past had little time or inclination to attend to our small affairs, whose remoteness makes them appear even smaller.
When you wake up in the morning, tell yourself: The people I deal with today will be meddling, ungrateful, arrogant, dishonest, jealous, and surly. They are like this because they can’t tell good from evil. But I have seen the beauty of good, and the ugliness of evil, and have recognized that the wrongdoer has a nature related to my own — not of the same blood or birth, but of the same mind, and possessing a share of the divine. And so none of them can hurt me. No one can implicate me in ugliness. Nor can I feel angry at my relative, or hate him. We were born to work together like feet, hands, and eyes, like the two rows of teeth, upper and lower. To obstruct each other is unnatural. To feel anger at someone, to turn your back on him: these are obstructions.
People think that I'm really untouchable, and that's also translated into a lot of people thinking that I'm super-ungrateful.

The people who are successful are those who are grateful for everything they have. Giving thanks for what we have always opens the door for more to come, and ungratefulness always closes the door.
Art criticism, I would say, is about the most ungrateful form of 'elevated' writing I know of. It may also be one of the most challenging.. if only because so few people have done it well enough to be remembered.. but I'm not sure the challenge is worth it.
What really kills me—it really rips me up—is when people think I’m abrasive, inconsiderate or ungrateful because I don’t go outside in a bikini and wave to the paparazzi. Come on!