A mirror
Three qualities colour every mind. Sattva — light, clarity, ease. Rajas — motion, wanting, heat. Tamas — weight, fog, inertia. None is bad; all three move through you, and the mix shifts by the day. Six honest moments, about two minutes — answer from the last few days as they actually were, not as you'd like them to have gone. Nothing is scored; you'll simply see which is loudest in you right now.