John Trapp on Romans 1:18

Verſe 18. Who hold the truth] Hold the light of their conſciences (which is as a Prophet from God) priſoner. The naturall man, that he may ſin the more ſecurely, impriſons the truth, which he acknowledgeth, and laies hold on all the principles in his head, that might any way diſturb his courſe in ſin, locking them up in reſtraint. Hence it appears that no man is righteous in himſelf, or by his own righteouſnes, which was the [non-Latin text not transcribed]