According to Osho, yes: celebration is an unconditional attitude of witnessing life’s totality. Do not identify with misery; watch it as a deep, silent night that contains its own beauty and rest. By accepting both poles—happiness and sadness—you discover depth and rejuvenation. Celebration means gratitude for whatever arises, abandoning escape and interpretation, allowing awareness to transform even sorrow into a nourishing experience.
You can ‘celebrate’ sadness by not fighting it—just watch it kindly, like a quiet night, and be thankful it’s part of life.