Tricky Cards Puzzle

You are given a total of 23 cards. Each of these cards has a cross(as shown) image on one side, and a circle image on the other side. You have been told that 14 cards in the set are laying with the cross up, and therefore remaining 9 cards are with the circle up. But you don't know the order in which the cards are. Moreover, you are in a totally dark room, so that you can't see anything.

How will you, without seeing anything, divide the set of cards in two smaller sets, in such a way that both sets have the same number of cards with a cross up?