ויעש אהרן ובניו את כל הדברים אשר צוה ד' ביד משה
Rashi explains that the Torah is recording their praise in that they swerved neither to the right nor to the left. They followed the straight course as dictated to them by Moshe Rabbeinu. They had much to do, many mitzvos with a multitude of details. Nonetheless, whatever Moshe instructed them, they did. The Sifra adds that, despite their being commanded by a contemporary, they executed the commandments as if Hashem Himself had spoken to them. While we would expect Aharon and certainly his sons to perform the service, the inherent joy they manifested was to their credit, for it showed…