The poem sets two pockets side by side, and the whole meaning comes from how unequal they are. In the speaker's pocket there is a match and a hand: a small, single-use object and the body part that would have to strike it. In the other person's pocket, the poem says, there is simply "the fire." No match is needed. His power is already complete, already burning, and kept out of sight.
The speaker seems to feel small and outmatched. A match is a tiny thing, and the word "hand" suggests someone who can act but only in a limited way. The other figure carries something far larger and more dangerous without even having to show it. The poem doesn't say who "he" is, so he could be a rival, an authority, or a lover. That openness makes him feel more threatening.
The mood is tense and quiet. Nothing happens, yet the lines feel like a standoff, with both people holding something in reserve.