Domenico Scarlatti has been heralded as "the master of the phrase" in recent analytical literature (Sutcliffe 2003). Scarlatti brilliantly uses sentential repetition to generate a complex phrase design in his Primary Theme (measures 1-11) that keep the listener (and the analyst) fully engaged, like listening to a musical kaleidoscope that is ever changing. My presentation explores how Scarlatti uses embedded sentential designs (Schoenberg 1967, Forrest and Santa 2019) to construct a complex single phrase in his Sonata in E-flat Major, K.51. I ultimately argue that his employment of sentences can be understood as an elemental component of his iconic musical style.