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However, when you talk to someone who is dead isn’t that similar to the seance type of thing that we are not supposed to be involved with. Kind of like what Saul got in trouble with when he tried to have the Witch of Endor call up Samuel so that he could ask his advice.

One of the first things Moses heard that God is the God of the living, not the dead. When Saul did that, the gates of Heaven were closed and the righteous dead were waiting for the coming of Christ. But all of those are now in Heaven and alive in Christ.

The Catholic Church also makes a distinction between the Church Triumphant (the saints, canonized and uncanonized, in Heaven), the Church Suffering (those is Purgatory), and the Church Militant (the faithful on earth). Though the three are in different places, they are part of one Church and pray on behalf of each other to the Most Holy Trinity.