If you don't know how to be grateful, the power you can exercise is very limited, because gratitude connects you with power. -The power of Rhonda Bourne

No one is born to be kind to anyone, so we should learn to be grateful. -Jostan Gard's Sophie's World.

An ungrateful child is more painful than a poisonous snake's teeth. -Shakespeare's King Lear

I look at the gray sky in the morning, grateful for the air, grateful for the light and grateful for being alive. -The Kite Runner by Khaled Husseini.

Gratitude is the product of high education, which ordinary people can't get. It is human nature to forget or not thank. -Dale Carnegie's The Weakness of Human Nature

Most men and women in love inevitably rely on the gratitude and vanity of both sides, so it is hard to let go. -Jane Austen's Pride and Prejudice