Behold, my belly That is, my mind or heart; is as wine which hath no vent Is as a bottle filled with wine. Or, my thoughts and affections work within me, like fermenting wine in a bottle, and must have utterance. An elegant similitude, as Mercer observes. The wine is here put, by a metonymy, for the bottle in which it is contained. It is ready to burst like new bottles That is, bottles of new wine; for otherwise, the bottles being made of leather, those that were old were more liable to burst than such as were new. I will speak, that I may be refreshed That I may ease my mind of those thoughts which now oppress it. I will open my lips, and answer I will not utter impertinent words, but solid answers to Job's arguments.
Related Commentaries of Job 32:19
Job 32:19-20
19 Behold, my belly is as wine which hath no vent; it is ready to burst like new bottles.
20 I will speak, that I may be refreshed: I will open my lips and answer.