Sad Failure Quotes; Sadness is but a Wall between two Gardens. In the depths of sadness, we confront the enduring nature of this emotion. As Vincent van Gogh once said, ‘The sadness will last forever.’ Paulo Coelho’s words remind us that tears are a silent language of pain. Sadness can act as a barrier to joy, yet it’s a necessary step for personal growth, as Rumi suggests. In embracing sadness, we find the potential for transformation.