The Torah gives a lot of rules and laws on the sacrificial service. The reason is to avoid us falling into anarchy and losing sight of what the service is for.

The Book of Exodus ends with the Pillar of Fire to guide the Jews by night & the pillar of smoke in the day.  This is to show the Jews that they are to follow God's ways throughout their lives

The reason that we have so much detail in the Torah about building the Tabernacle is that people need ritual in order to remember.  As has been observed, more than the Jews have kept Shabbat, the Shabbat has kept the Jews.

The Torah goes into detail about everything in the building of the Tabernacle.  Why?  To avoid misinterpretation by the artist.

The Torah stresses that keeping Shabbat is more important that building the Tabernacle.  That if we do not keep Shabbat then what is the Tabernacle for?

We all have to remember that we all have talents and they come from God. That after we return God will ask what we did with the gifts that He gave us.

After the incident of the Golden Calf Moses rebukes Aaron for allowing the situation to get out of control. He reminds him that a leader is responsible for the actions of his subordinates.

When Moses seems to be delayed coming back from Mt. Sinai the Jews build an idol.  It seems strange until we remember that they were only recently freed from Egyptian bondage and the only society that they knew was Egyptian.