The quote suggests that pictures serve as gateways to new and unanticipated experiences or insights. When we look at images, they can reveal deeper meanings and emotions, leading us to explore thoughts and feelings we might not have encountered otherwise. Just as doors can lead to hidden rooms, images invite us to engage with the complex layers of our imagination.
In Arthur Edward Waite's "Pictorial Key to the Tarot," he emphasizes the power of imagery in understanding the Tarot. Each card encapsulates rich symbolism that opens up a myriad of interpretations and personal reflections, much like how a door may lead one into a vast and intricate space filled with surprises and depth.