Macbeth Quote, What does it mean?

"Shakespeare is basically trying to say that there is no point to life because life is just like a walking shadow in a short play on a stage. Once the shadow leaves the stage, he is never seen, just like when you die, you are never heard of again. Life, according to this, is just an idiotic tale full of pointless liveliness and energy, but in the end, it means and signifies nothing."