The third blessing of the amidah, Atah Kadosh, seems mysterious to me:
You are holy and your name is holy, and the holy ones bless you all day. Blessed are you Hashem, the Holy God.
Is there any particular kavanah that one one should be having while reciting this blessing? We know that God is holy but how is mentioning that a prayer and what significance does it have within the amidah?