What are the motifs in Sir Gawain and the Green Knight, Pearl, and Sir Orfeo by J.R.R. Tolkien?

Death and the Life to Come is ultimately another Christian idea of these three pieces. But all three pieces understand death according the Medieval Christian theology. First, in Sir Gawain and the Green Knight, Sir Gawain at times appears to believe that in fact that Green Knight will kill him with his axe. He is afraid to submit to his agreement with the Green Knight to bear his neck. He also finds the Green Knight on a barrow, or a tomb. Further, the Green Knight has the miraculous power to survive death. In his worry, Sir Gawain hopes that his moral excellence will lead to God's favor in the afterlife but he is distraught when his righteousness is tainted by his sin. Additionally, the whole plot is set in motion by Morgan de Lay's desire to kill Queen Guinevere.