Ray Bradbury said this quote

Sometimes the man who looks happiest in town, with the biggest smile, is the one carrying the biggest load of sin. There are smiles & smiles; learn to tell the dark variety from the light. The seal-barker, the laugh-shouter, half the time he's covering up. He's had his fun & he's guilty. And all men do love sin, Will, oh how they love it, never doubt, in all shapes, sizes, colors & smells. Times come when troughs, not tables, suit appetites. Hear a man too loudly praising others & look to wonder if he didn't just get up from the sty. On the other hand, that unhappy, pale, put-upon man walking by, who looks all guilt & sin, why, often that's your good man with a capital G, Will. For being good is a fearful occupation; men strain at it & sometimes break in two. I've known a few. You work twice as hard to be a farmer as to be his hog. I suppose it's thinking about trying to be good makes the crack run up the wall one night. A man with high standards, too, the least hair falls on him sometimes wilts his spine. He can't let himself alone, won't let himself off the hook if he falls just a breath from grace.