It is the Christmas time: And up and down 'twixt heaven and earth, In glorious grief and solemn mirth, The shining angels climb.

Mulock’s lines frame Christmas as a moment when the boundary between the human and the divine feels unusually permeable: angels “climb” between heaven and earth, suggesting traffic, mediation, and message-bearing. The paradox “glorious grief and solemn mirth” captures the season’s double register—joy at the Nativity and the shadow of suffering implicit in Christian theology (the child born toward sacrifice), as well as the way Christmas often mingles celebration with poignancy in lived experience. The “shining” ascent/descent also evokes liturgical imagery: Christmas as a time of heightened spiritual attention, when ordinary life is briefly illuminated by transcendent meaning.