 Now, of course, this is the preaching of the kingdom, which is the third luminous mystery, the third mystery of light. Pope goes on to say the inauguration of that ministry of mercy, which he continues to exercise until the end of the world, particularly through the sacrament of reconciliation that he has entrusted to his church. The mystery of light par excellence is the transfiguration, traditionally believed to have taken place on Mount Tabor. Now,