Hebrews 13:9

Be not carried about with divers and strange doctrines
The word "divers" may denote the variety and multitude of other doctrines; referring either to the various rites and ceremonies of the law, or to the traditions of the elders, or to the several doctrines of men, whether Jews or Gentiles; whereas the doctrine of the Scriptures, of Christ, and his apostles, is but one; it is uniform, and all of a piece; and so may likewise denote the disagreement of other doctrines with the perfections of God, the person and offices of Christ, the Scriptures of truth, the analogy of faith, and even with themselves: and "strange" doctrines may design such as were never taught by God, nor are agreeable to the voice of Christ, nor to be found in the word of God; and which are new, and unheard of, by the apostles and churches of Christ; and appear in a foreign dress and habit: wherefore the apostle exhorts the believing Hebrews not to be "carried about with them"; as light clouds and meteors in the air, by every wind: for so to be, is to be like children; and discovers great ignorance, credulity, levity, inconstancy, uncertainty, fluctuation, and inconsistency:

for it is a good thing that the heart be established with grace;
with the doctrine of grace, which is food for faith, and does not leave men at uncertainties about things; but establishes the heart, with respect to the love and favour of God, and builds souls upon the foundation, Christ; so that they are not at a loss about the expiation of sin, justification, and salvation; but firmly look for, and expect eternal happiness by Christ, and rejoice in hope of the glory of God:

not with meats;
referring to the distinction of meats among the Jews; or the sacrifices ate both by the priests and by the people; or the whole ceremonial law which stood in divers meats and drinks:

which have not profited them that have been occupied therein;
they were only profitable to the body; and could be of no other use to the soul, when they were in force, than as they led to Christ, and were regarded by believers; for they were of no advantage to hypocrites and carnal men; they could not sanctify, nor justify, nor cheer the spirits, nor establish the heart; and are of no manner of service at all, since the death of Christ, whereby the whole ceremonial law is abolished.