To do two things at once is to do neither.
What makes this Roman observation so enduring is that it captures something our modern multitasking mythology refuses to admit—that excellence requires a kind of presence that cannot be divided. The wisdom isn't simply that splitting your attention yields poor results (we know that), but rather that attempting two things simultaneously creates a third problem: you lose the ability to *commit* fully to either one, which is where quality actually lives. A surgeon cannot excel while answering emails; a parent cannot truly listen to a child's story while scrolling their phone. Syrus understood that some acts of thought, care, or creation demand what you might call sovereignty of mind—and that's what we genuinely sacrifice when we pretend otherwise.