Acharya Prashant explains that internal spiritual change must be observable in one's tangible, sensory, and material life. Just as physical weather changes are visible to the eyes through mist or temperature drops, internal shifts should manifest in facial expressions, behavior, and physical states. He emphasizes that spirituality relies on observation as much as science does. If no change is visible in one's ordinary life or in the mirror, then no real internal transformation has occurred. He suggests that one does not necessarily need a guru or scripture to verify progress; simply looking at oneself with ordinary eyes can reveal the truth of one's state.