" Burnout is also why passive language learning activities can sometimes be very beneficial. For example, relaxing to a song, movie, book, or conversation in a target language without looking up any words or preoccupying the mind with linguistic minutiae. In these moments, learners can focus on mastering what they already know. As for the unknown, they can draw inferences based solely on context without racking their brains. Passive language activities are doubly productive when learners have acquired a solid language base, without which their ability to rehearse, refine, and infer is constrained. "

― Benjamin Batarseh , The Art of Learning a Foreign Language: 25 Things I Wish They Told Me