Found these quotes while surfing the net: here.
Some good ones. Taking a closer look at 5 through 7, gives a wide variety of viewpoints about poker.
5. Jack Strauss on Poker
6. From Poker Nation by Andy Bellin
In the absence of any mathematical explanation, one thing is for certain; if you engage in games of chance long enough, the experience is bound to affect the way you see God. Successfully draw to an inside straight three hands in a row, and you’ve got to be blessed. But if you’re the person drawn out on, the one whose trip aces just got snapped for the third time, you will go home feeling cursed.
7. From The Gentleman’s Handbook on Poker by William J. Florence
The strong point in poker is never to lose your temper, either with those you are playing with or, more particularly, with the cards. There is no sympathy in poker. Always keep cool. If you lose your head you will lose all your chips.