see Ps 139:13. God not only gives conception, and forms the embryo in the womb, but fashions and gives it its comely and proportionate parts. Or, "covered me"; the first word may respect conception, and this the covering of the fetus with the secundine ; see Ps 139:13;give me understanding, that I may learn thy commandments; since he had a proper comely body, and a reasonable soul; though debased by sin, and brought into a state of ignorance, especially as to spiritual things, he desires he might have a spiritual understanding given him; of the word of God in general, the truths and doctrines of it, which are not understood by the natural man; and of the precepts of it in particular, that he might so learn them as to know the sense and meaning of them, their purity and spirituality; and so as to do them from a principle of love, in faith, and to the glory of God: for it is not a bare learning them by heart, or committing them to memory, nor a mere theory of them, but the practice of them in faith and love, which is here meant.
Vid. Hackmam. Praecid. Sacr. p.