We can perceive that something can be infinite, but that doesn't follow that there is a specific force that can cause that.

Also, I'm not even sure that there are infinite possibilities for a candle to burn. I'm neither a mathematician or a physicist, but I'm pretty sure each atom in that candle has a maximum range of motion, which is a real number. If you could calculate the number of atoms or molecules or what have you in the candle, and how much each of them can move, you'd end up with a real number. Granted it would likely take a very long time, but the number certainly wouldn't be infinite.