BETH. Wherewithal shall a young man cleanse his way? by taking heed [thereto] according to thy word.
Ver. 9. Wherewithal shall a young man] Semipuer, a lad, a stripling, who hath his name in Hebrew of tossing to and fro; confer Ephesians 4:14, and the same word signifieth youth and tow, Isaiah 1:31, or rather the shreds that fall from tow and flax, when whiffied; to note the vanity of youth, and its aptness to be enkindled, when once affections begin to boil within them. The Greek word for a youth comes from another that signifieth to be hot, and to boil up, or scald, ηιθεος of αιθω, and αιζηος of ζεω. Such a one, therefore, had need (if ever he think to be blessed, as Psa 119:1) to cleanse his ways by cleaving to the word; since an impure heart and an undefiled inheritance will not stand together.
Cleanse his way] Mandabit, id est emendabit. The Hebrew word signifieth the cleansing of glass, which though it be very clean, yet will it gather filth even in the sunbeams, and of itself; which noteth the great corruption of this slippery age, and what care must be taken that it may shine as picked glass, or clearest crystal.
By taking heed thereto according to thy word] Which is of a purifying property, John 15:3; John 17:17, and can cleanse the heart of a young man also, where lusts are strong, stains deep, and will not out without fuller's soap. There is a sharpness in these wholesome (or healing) words, that maketh us sound in the faith, and sincere in practice; as it did Mr Paul Bains, whose conversation, when he came first to Cambridge, was so irregular, that his father, being grieved at it before his death, left with a friend forty pounds by the year, desiring that his son might have it if he amended his manners; else not. He did so, and had it (Mr Clark's Lives). When a child is come to be thirteen years and a day old, the Jews account him a man, and call him Barmitsuah, a child of the commandments; because bound to live by the law (Leo Modena of Jewish rites).