It is the most human and kindly of seasons, as fully penetrated and irradiated with the feeling of human brotherhood, which is the essential spirit of Christianity, as the month of June with sunshine and the balmy breath of roses.

Curtis praises the Christmas season as a time when ordinary social barriers soften and people act with unusual warmth, generosity, and mutual regard. By calling it “the most human and kindly of seasons,” he frames Christmas less as a doctrinal observance than as an annual renewal of social sympathy—“human brotherhood” as Christianity’s core ethical impulse. The comparison to June’s sunshine and roses emphasizes that this moral atmosphere can feel as pervasive and natural as summer light: it suffuses public life, not merely private devotion. Implicitly, the line also suggests a standard by which Christianity should be judged—by its capacity to cultivate humane fellowship rather than sectarian rigor.