Hebrews 13 – A warning against following false doctrines and false gods. 2018

Heb 13:9
Do not be carried away by varied and strange teachings; for it is good for the heart to be strengthened by grace, not by foods, through which those who were thus occupied were not benefited.

It would appear that Paul is dealing with a problem with the Hebrews that is not otherwise specified. "Do not be carried away with various and strange doctrines." This is a warning against following false doctrines and false gods. This was astutely warned against in the Torah.

Deut. 31:16-18 And the LORD said to Moses, “Behold, you are about to lie down with your fathers; and this people will arise and play the harlot with the strange gods of the land, into the midst of which they are going, and will forsake Me and break My covenant which I have made with them. 17“Then My anger will be kindled against them in that day, and I will forsake them and hide My face from them, and they shall be consumed, and many evils and troubles shall come upon them; so that they will say in that day, ‘Is it not because our God is not among us that these evils have come upon us?’ 18“But I will surely hide My face in that day because of all the evil which they will do, for they will turn to other gods.

Our heart is to be strengthened by grace. Paul warns that our heart is not strengthened with the animal sacrifice. (I believe that is what he is referring to here...)
This chapter contains a number of concluding exhortations that promote law-abiding holiness. The emphasis is very practical and reminds us that our faithfulness in Yeshua must always show forth in our actions.

This chapter begins with "Let brotherely love continue." This is the long-standing and powerful command given in Leviticus to "love your neighbor as yourself" (Lev. 19:18, 19:34-not shown).