Tim Gray shows that the todah sacrifice is what links and underlies the Passover and the Mass. Introduced in the Old Testament, the todah—in contrast to the yearly celebration of Passover—was a continual sacrifice of thanks and praise to God for His saving actions: "A todah sacrifice would be offered by someone whose life had been delivered from great peril." Just as the Passover was a sacrifice in memory of when the Jewish people had been saved from death during their exile in Egypt, so too, the Mass is a continual sacrifice of thanksgiving for our salvation.