Each aspect of Avoda has the two requisite parts: A. He inspires (אתערותא דלעילא) B. We work. This is true in each of the following scenarios: 1) Before the original sin we had work, that He inspired. 2) After the giving of the Torah there was the building of the Mishkan. 3) After building the Mishkan there was there ws the need for קרבנות there. The work brings us (ultimately) higher than what inspired us to grow in the first place.