One of the important themes in this poem is the value and power of human warmth, and the happiness and strength that others can derive from this.
The group and their items represent the hopeful, joyful side of life. By evoking this particular scene, the speaker is hoping that the reader can experience the same uplifting feeling of contentment that he did.
The joy and goodwill emanating from the group is inspired by the tradition of gift giving at Christmas yet despite the religious imagery, this is a secular poem.
The speaker suggests that fraternity and generosity can provide as much fulfilment and protection from the negative aspects of life as any form of organised religion. In a society which is becoming increasingly secular and isolated, the speaker celebrates the positive attributes of humanity and the strength that we can draw from one another.