Your brain accounts for roughly 2% of your body weight but consumes about 20% of your daily energy. That consumption isn't evenly distributed across all mental activities. Focused, voluntary attention (the kind you use when navigating a rocky trail or solving a puzzle you care about) draws on neural circuits that are remarkably efficient when properly engaged.
Attention is the brain's filtering mechanism; what passes through that filter is what gets encoded. What gets encoded becomes memory. And memory is the raw material of identity. So in the architecture of your identity, attention is the doorway.
Multitasking is the biggest con the modern world has ever sold us, right up there with fad diets that promise you can eat nothing but cheddar cheese and still lose ten pounds. Dr. Steve Robbins, the 2024 keynote speaker at the American Marketing Association Symposium for the Marketing of Higher Education, reminded us that people are not wired to process multiple high-level tasks simultaneously.