You know that feeling when you just wake up on the right side of the bed? You had some great sex the night before, got a solid 8+ hours of sleep, got up on your first alarm, had a good breakfast, dropped an epic morning log, hit the gym and had a solid workout, then arrive at work ready to kick the day in the nuts? It's like that. Just a clean, natural energy and wakefulness. It almost makes your brain feel young. Like that mental sharpness you had when you were a kid before stress, alcohol, etc slowed your brain down.