Health - See the Proverbs 3:8 note.

For they [are] life unto those that find them, and health to all their (i) flesh.
(i) That is, they will have health of body: under which all other blessings promised in the law are contained.

For they are life unto those that find them,.... The words or doctrines of Christ, whose type Solomon was, are to be found in the field of the Scriptures, by diligent searching for them; and being found, they are the means of spiritual life, and of maintaining it, and of showing the way, and bringing unto eternal life; see John 6:63;
and health to all their flesh; the whole man, soul and body, as they are the means of preserving the body from many diseases, which intemperance, lust, and luxury, lead unto, and are curbed by these; so of healing the various diseases of the soul; and, however, of directing to a panacea for them, to the blood of Christ, which is the true balm of Gilead, and he the physician of souls. Moreover, the doctrines of the Gospel are the wholesome words of our Lord Jesus; they are sound, salutary, and healthful, and serve to keep the soul in good plight, and the body too. The Septuagint render it, "to all flesh": that is, to all men; but this is not true in fact; for to some the Gospel of Christ, through contempt and rejection of it, is the savour of death unto death.

health . . . flesh--by preserving from vices destructive of health.