John Trapp on 2 Timothy 1:13

Verſe 13. Hold faſt the ſorm] The catechiſticall principles, that method, ſyſtem, ſhort ſumms of Divinity that St Paul had compiled for Timothies uſe; called here not only a form, as Rom. [non-Latin text not transcribed]. 6.17. but a ſhort form, or brief method; ſuch as hath both perſpicuity and brevity.