Psalms 119:131

131.I opened my mouth and panted. (11) By these words the Psalmist would have us to understand that he was inflamed with such love to and longing for the divine law, that he was unceasingly sighing after it. In comparing himself to such as are hungry, or to such as burn with parching thirst, he has used a very appropriate metaphor. As such persons indicate the vehemence of their desire by opening the mouth, and by distressful panting, as if they would suck up the whole air, even so the Prophet affirms that he himself was oppressed with continual uneasiness. The opening of the mouth, then, and the drawing of breath, are set in opposition to a cold assent to the word of God. Here the Holy Spirit teaches with what earnestness of soul the knowledge of divine truth is to be sought. Whence it follows, that such as make little or no proficiency in God’s law, are punished by their own indolence or carelessness. When David affirms that he panted continually, he points out not only his ardor but also his constancy.