The Divine service of our generation... contains a dimension of superiority (and in this context, an incomparable advantage) over the Divine service accomplished in previous generations, for the Divine service of previous generations was related to reason and logic.... The Divine service at the conclusion of the period of exile, by contrast, reflects the willingness for self-sacrifice, which emanates from the innermost level of the soul.(From a discourse of the Rebbe)
(L'Chaim)