“Be mindful of what you're mindful of. You actually have some control over what your brain decides to delete while you sleep. It's the synaptic connections you don’t use that get marked for recycling. The ones you do use are the ones that get watered and oxygenated. If you spend too much time reading theories about the end of Game of Thrones and very little on your job, guess which synapses are going to get marked for recycling?”