John Trapp on Psalms 39:3

Verſ. 3. My beart was hot within me] It was almoſt ſuff ocated for want of vent. By heat of heart, and fire kindled, ſaith One, the Prophet meaneth,T. W. in loc. not only the greatneſs of his grief, as they that are grievouſly ſick feel great force and power of heat; but he meaneth alſo ſome motions that he had to impatiency and fretting; to which fault they are very much ſubject, that are hot, and given to heat, Thus He. This diſtemper to prevent, God and Nature have placed the heart neer unto the lungs, ut cum irâ accenditur, pulmonis humore temperetur, that when it is heated with wrath, it may bee cooled and qualified by the allay of the lungs.

While I was muſing, the fire burnt] This ſheweth that thoughts and affections are the mutuall cauſes one of another; ſo that thoughts kindle affections, and theſe cauſe thoughts to boil. And hence it is, faith a Reverend man, that new-converts, having new and ſtrong affections, can with more pleaſure think of God, than any.

Then ſpake I with my tongue] But better he had held his tongue, according to his firſt reſolution. The Greeks have a ſaying, Let a man either keep ſilence, or ſpeak that which is better than [illegible: 1 letter]lence. Auſtin paraphraſeth thus; when I refrained ſo from ſpeaking, for fear of ſpeaking evill, that I ſpake no good, I was troubled at this my ſilence; leſt my ſin ſhould be counted greater for this ſilence, than my vertue in refraining from ſpeaking evill.