Context switching significantly hampers concentration and mental sustainability, acting as a poison for clear thinking. The brain does not efficiently process information in parallel; therefore, switching attention demands considerable cognitive resources. Each interruption, such as checking an email while trying to focus on writing, initiates a complex biological process that requires time to stabilize. This incomplete context switching leads to cognitive overload, resulting in exhaustion and diminished productivity. The analogy of a physically exhausting job, where constant interruptions prevent effective work, illustrates the mental fatigue linked to frequent distractions. Ultimately, frequent context switching is detrimental, akin to the physical strain of repeatedly running up and down stairs, undermining one's capacity for productive work.