Ask Around Your Shabbos Table

כָּל־חֲכַם־לֵב בָּכֶם יָּבֹֹ֣אוּ וְיַַֽעֲשׂוּ אֵת כָּל־אֲשֶר צִוָּּה ה‘ - And every wise hearted person among you shall come and make everything that HaShem has commanded. (Shemos 35:10)

In parshas Teruma, HaShem reveled to Moshe what the purpose of the Mishkan will be: וְעָּשׂוּ לִי מִקְדָּש וְשָּכַנְתִי בְתוֹכַָּֽם - And they shall make Me a sanctuary and I will dwell in their midst

Ask around your Shabbos table: In parshas Vayakhel, Moshe Rabbeinu relates to Bnei Yisroel everything about the Mishkan, yet he omits the most important part - its purpose! Why did he do that?