Acharya Prashant explains that the soul is not a material object and therefore cannot be detected by medical science. Since matter occupies space and exists in time, and the soul does neither, it is non-material and beyond the dimensions of space and time. He asserts that the soul is unimaginable and beyond the reach of the mind, as the mind can only conceptualize things with form, shape, or physical presence. To know the soul, one must quiet the mind; in that state of absolute silence, one exists as the true self or the soul.