וַיֵּ֣לֶךְ הָאִ֔ישׁ אֶ֖רֶץ הַחִתִּ֑ים וַיִּ֣בֶן עִ֗יר וַיִּקְרָ֤א שְׁמָהּ֙ ל֔וּז ה֣וּא שְׁמָ֔הּ עַ֖ד הַיּ֥וֹם הַזֶּֽה׃ (פ)
Orang itu pergi ke negeri orang Het, lalu membangun sebuah kota dan menamainya Lus; itulah namanya sampai hari ini.
Akeidat Yitzchak
That concept was taught to Jacob in the dream via the vision of the ladder. Another way of expressing the lesson is this: Only after mastery of the lessons of ma-aseh bereshit, the workings of the physical universe, can one hope to gain insights into ma-asseh merkavah, the workings of celestial relationships.