how does puck's epilogue speech reinforce the connections between dreaming, imagination, and illusion?

The final act also serves to challenge the audience's notions about reality and imagination. Seeing the pathetic acting of the artisans, Theseus remarks that, "The lunatic, the lover, and the poet / Are of imagination all compact" (5.1.7-8). By this he means that it is imagination which makes people crazy, but it is also the imagination which inspires people. Without imagination it would be much more difficult to enjoy a play.