This quote compares life to a game of cards. It is saying that the circumstances we are born into – our family, the place we are born, our health, etc. – are predetermined and out of our control, just like how the cards we are dealt in a game of cards are beyond our control. But, the next part of the quote is saying that even though this is true, we still have free will when it comes to making decisions about how to live our lives. This could be compared to how we can choose how to play the hand of cards we are dealt in a game of cards. We can decide which cards to keep and which cards to use, what strategies to use, and so on. So, even if our starting conditions and circumstances in life may be predetermined and out of our control, it is up to us to choose how we will live our lives, just like how we are free to choose how to play the hand of cards we have been dealt.