Few would describe the book of Leviticus as a page-turner. Its often-turgid descriptions of sacrifices (or korbanot) can be seen nowadays as perfectly calculated to let shul-goers catch up on their sleep. When we as a people lost korbanot, however, we lost something deeply profound — and our relationship with God demands that somehow we recover it.
Offering a korban (from the word karov, to come close) is a hands-on project.
But this very human need is not given free rein; rather, the offering of sacrifices is governed by strict regulations, in order that we tangibly relate to God in a true, proper way.