John Trapp on Jeremiah 4:3

Ver. 3. Break up your fallow-ground] Novellate vobis novale: Tertullian rendreth it, Renovate vobis novamen novum, put off the old man, and put on the new. See Hoſ. 10.11. with the Notes. By the practiſe of Repentance, runcate, exſtirpate, root up and rid your hearts and lives of all vile luſts and vicious practiſes. The breaking up of ſinful hearts, may prevent the breaking down of a ſinful Nation.

Sow not among thornes] i. e. Cares and luſts of life, fitly called thornes,—becauſe 1. They prick and gore the ſoul. 2. Harbour the old Serpent. 3. Choke the Word: there's no looking for a harveſt in a hedge. Stock them, and ſtub them up therefore, 1 Pet. 2.1. Jam. 1.21. do not plow here, and make a bawk there, &c.