Jamieson, Fausset and Brown on Exodus 31:3-5

3-5. I have filled him with the spirit of God--It is probable that he was naturally endowed with a mechanical genius, and had acquired in Egypt great knowledge and skill in the useful, as well as liberal, arts so as to be a first-class artisan, competent to take charge of both the plain and ornamental work, which the building of the sacred edifice required. When God has any special work to be accomplished, He always raises up instruments capable of doing it; and it is likely that He had given to the son of Uri that strong natural aptitude and those opportunities of gaining mechanical skill, with an ultimate view to this responsible office. Notwithstanding that his grand duty was to conform with scrupulous fidelity to the pattern furnished, there was still plenty of room for inventive talent and tasteful exactness in the execution; and his natural and acquired gifts were enlarged and invigorated for the important work.