A little over simplistic, but here goes.
Given: According to my understanding of the four noble truths, expectations are the source of our suffering, and thus by letting go of expectations we can also end our suffering.
Problem: Can we really live without expectations? Forget the basic drives hardwired into us as expectations. I mean those basic societal expectations, those relational expectations that we get and need to live with every day from those we love (especially) and those we work with and those we share basic social space with. Every moment of every day is filled with expectations accordIng to whatever culture you are in. In this worldly realm I can't even imagine giving up all my expectations. That's how I (we) function in this world filled with all these people that have all these expectations. The more I examine my expectations the more I realize how valuable they are. How can I possibly give them up?