Why is “light” used as a metaphor for “good”, while “dark” means “bad”? How does that blind us and what might we do about it? As Mariana Alessandri writes in Night Vision, difficult feelings such as anger, sorrow, grief, depression and anxiety can be sources of knowledge, so we need to embrace them as part of humanity.

Her book is not a gloom manifesto. Instead, it seeks to clarify why we feel bad about feeling bad. This is an outcome of social pressure to look on the bright side, so telling each other “don’t worry, be happy” causes shame. As a philosopher, Mariana explains that the problem has ancient roots, which are entangled with positive thinking. She also highlights alternative sources with more helpful messages.

Our conversation explores practicalities, including how to strike a balance between acceptance and change – both individually and as a society. We touch on overlaps with yoga, such as the fusion of older ideas with Western “New Thought” (whose original “mind cure” shapes modern-day “manifesting”). And we consider ways of seeing beyond dark and light to more diverse perspectives.

Night Vision is out now in paperback, ebook and audio – it’s engagingly written, but with scholarly rigour. For a taste of Mariana’s work, try this New York Times essay on the children’s TV host Fred Rogers, whose “belief that we should validate emotions, not suppress them, is wisdom for all ages”.

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