כִּ֣י כֹה֩ אָמַ֨ר יְהוָ֜ה אֱלֹהֵ֣י יִשְׂרָאֵ֗ל כַּ֤ד הַקֶּ֙מַח֙ לֹ֣א תִכְלָ֔ה וְצַפַּ֥חַת הַשֶּׁ֖מֶן לֹ֣א תֶחְסָ֑ר עַ֠ד י֧וֹם תתן־[תֵּת־] יְהוָ֛ה גֶּ֖שֶׁם עַל־פְּנֵ֥י הָאֲדָמָֽה׃
For thus saith the LORD, the God of Israel: The jar of meal shall not be spent, neither shall the cruse of oil fail, until the day that the LORD sendeth rain upon the land.’
Akeidat Yitzchak
They are: 1) Favourable external conditions, commonly called mazzal) Expertise by those engaged in the project. 3) Command of the theory underlying the project. 4) Divine assistance in overcoming human inadequacy. 5) Outstanding moral and intellectual stature, which freely translated means "Divine inspiration." Since Moses possessed all these qualities, even if he was deemed to have erected the tabernacle, "the tabernacle was erected by itself," i.e. no human effort by itself would have sufficed, not even that of Moses.