Jaron Hoffman closes out this chapter with an exposition of verses 18-20.
(v.18a) Timothy reaffirmed in his Gospel charge;
(vv.18b-19a) Believers encouraged to wage the good warfare, persevering in the faith;
(vv.19b-20a) Warning to those who reject the true doctrine of the faith and their own conscience;
(v.20b) Instruction in how the church is to respond to those who make shipwreck of their profession.