https://youtu.be/hVycb2X38Ww

Hebrews 13:7-17 NKJV

This portion of the letter starts and ends the same- Remember them who have the rule over you — rather the guides who have spoken unto you the word of God — Remember who they were, and your obligations to them; and do not forget their instructions and their examples. This may refer to James the brother of John, commonly called the first bishop of Jerusalem, both of whom had been put to death before this epistle was written; whose faith follow — Embrace by faith the same doctrines, precepts, and promises of the gospel which these men of faith embraced; and let your faith be assured, alive, and operative as theirs was, purifying your hearts, and rendering your lives fruitful to the glory of God; considering the end of their conversation — consider the manner in which they left this life;  and let the remembrance of these things engage you to retain their faith, and courageously to follow their steps in bearing the reproach of Christ. You see, James was the first apostle to be martyred for Christ.

Acts 12:1-2 NKJVIt was about this time that King Herod arrested some who belonged to the church, intending to persecute them. He had James, the brother of John, put to death with the sword. (cut off his head)

The letter goes on: Jesus Christ the same yesterday. He is unchangeable. The design of this acknowledgement is to encourage these Hebrew believers to persevere by showing that their Savior was always the same. He who had sustained His people in former times, was the same still, and would be the same forever. Perseverance is founded on the "immutability" of our Redeemer. If He were fickle, vacillating, changing in his character and plans; if today He aids his people, and tomorrow will forsake them; if at one time He loves the virtuous, and at another equally loves the vicious; if He formed a plan yesterday which he has abandoned today; or if He is ever to be a different being from what He is now, there would be no encouragement to our effort. Who would know what to depend on? Who would know what to expect tomorrow? For who could have any certainty that he could ever please a capricious or a vacillating being? Who could even know how to shape his conduct if the principles of God were not always the same?

Vs 9. Be not carried away rather than carried about by divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats. From the exhortation to imitate the faith of the departed leaders, the transition is natural to warnings against being carried away from it by new teachings. The faith remains unchanged, as Jesus Christ remains unchanged.

Galatians 1:6-9NKJV I marvel that you are turning away so soon from Him who called you in the grace of Christ, to a different gospel, 7 which is not another; but there are some who trouble you and want to pervert[a] the gospel of Christ. 8 But even if we, or an angel from heaven, preach any other gospel to you than what we have preached to you, let him be [b]accursed. 9 As we have said before, so now I say again, if anyone preaches any other gospel to you than what you have received, let him be accursed.

1 Timothy 4:1-3 NKJV Now the Spirit [a]expressly says that in latter times some will depart from the faith, giving heed to deceiving spirits and doctrines of demons, 2 speaking lies in hypocrisy, having their own conscience seared with a hot iron, 3 forbidding to marry, and commanding to abstain from foods which God created to be received with thanksgiving by those who believe and know the truth.

These passages refer to Jewish distinctions, still held to by Jewish Christians, between dean and unclean or polluted meats; and further to a new kind of religious self-discipline,