The power of the moment

Is it a dark conspiracy or perhaps part of some vast eternal plan that we spend weeks preparing for the physical aspect of Pesach - cleaning, cooking, running errands - to the point where we reach the Seder and are so exhausted that we can barely enjoy the experience?

How much time do we spend on the spiritual preparation? Whether it's the avoda of bedikas chometz, or learning the Haggadah so that our Seder can be more meaningful. Or do we sit back, conk out from exhaustion and wine, and attempt to pay attention as our children expound and affirm our decision to send them to good Jewish schools?