Anyone who has learned anything about using time efficiently and getting things done, knows that if you want to advance a certain matter, you must allocate a specific time for it. Important things can't be left for "in between," just by the by. This concept is found, fascinatingly, in the Torah portions of these weeks discussing the construction of the Tabernacle, the mishkan.
Why is the verse describing the commandments of God to Moses about the construction of the Tabernacle repeated so many times? What was Betzalel's argument with Moshe? And how did they actually build the temple in such detail when not everything was written in advance?
the sefer ends by discussing that the cloud stayed on top of the Mishkan until it was time for Bnei Yisrael to move. The movement of the cloud as a sign to travel is discussed at length, where it “should be” – in Sefer Bamidbar. So why does it conclude Sefer Shmot?
The laws of chillul Hashem (avoiding desecrating Hashem’s Name, which comes in several different forms) hold an important place in our spiritual world. Being careful about them overcomes a lot of other concerns. One source that highlights the seriousness of chillul Hashem is: “Any place where there is a chillul Hashem, we do not give honor to the teacher.” (Note that in the context of that quote in Sanhedrin, the teacher whose honor was pushed aside was none other than Moshe Rabbeinu.)
“The Mishkan was erected” (Shemot 40:17). What do we learn from the use of passive voice? “Moshe said before Hashem: ‘How will I have the power to erect it?’ Hashem answered: ‘You only have to place your hand there, and it will turn out that it is erected by itself’” (Rashi 39:33).