I had now brought my state of life to be much easier in itself than it was at first and much easier to my mind, as well as to my body. I frequently sat down to my meat with thankfulness, and admired the hand of God's providence, which had thus spread my table in the wilderness. I learned to look more upon the bright side of my condition and less upon the dark side ; and to consider what I enjoyed rather than what I wanted ; this gave me sometimes such secret comforts that I cannot express them ; and which I take notice of here, to put those discontented people in mind of it who cannot enjoy comfortably what God has given them because they see and covet something that He has not given them. All our discontents about what we want appeared to me to spring from the want of thankfulness for what we have.

-Robinson Crusoe- 1719, Daniel Defoe.