Counting the Omer
The period between Passover and Shavuot marks two kinds of movement through time: the passage of the seven weeks between the barley offering and the first wheat offering at the ancient Temple during these spring festivals, and the transition from slavery to true liberation. On Passover, we leave Egypt, but on Shavuot we receive the Torah, which gives us our purpose as a people, answering the question of the ultimate goal of our collective freedom.