2 Timothy 2:14-19

v14: A key task of pastors and elders is to remind those in their care "of what they already know."

v15: Those entrusted to preach the word are to handle it correctly.  This will require "great wisdom, study, and care," and will demand "considerable effort."

v16-18: "When errors or heresies come into the church, the infecting of one often leads to the infecting of many, or the infecting of the same person with one error often leads to the infecting of that same person with many errors."  The way error often comes is not by "boldly and openly" confronting the word of Christ but via "a corrupt interpretation" of it.

v19: "The Lord knows those that are his, and those who are not.  He knows them, that is, he recognises them, recognises them so that he will never lose them... No one can destroy the faith of anyone whom God has chosen."  This is a great comfort to us, and this comfort brings with it the duty of turning away from wickedness.