And you for me. [Though he realizes that might take some... time...]
Alright, let's get this started. [Cain scoops up a nearby deck and starts dealing the hand.] You want to get a better set of cards than your opponent. A "royal flush" is the best hand to get, with the three royal cards plus the ace and ten, all in the same suit.
There are a number of other hands below that, progressively down to the worst where you have only random cards. In that case, you hope that your opponents have the same hand, so you can win with the high card.