I believe in it, I think on a practical level humans are highly visual and we work best when we can visualise something, including visualising the steps needed to achieve it. Visualisation breaks things down, makes them easier to comprehend and actualise. I think that practical side helps the spiritual, because the power of the mind and self-belief (or lack thereof) is so strong, especially on a collective level. We subconsciously act according to what we believe is or isn't possible and change our decisions, levels of motivation/proactivity, and general behaviours accordingly.