What this quote means

This quote, often attributed to Wittgenstein but used by Greene, expresses a radical view of reality: everything that exists, everything that happens, constitutes the world. Nothing is beyond. It invites us to confront reality as it is, without illusions or escapes. The meaning of life is not found in an afterlife but in engagement with what is. A demanding yet liberating philosophy that pushes us to act here and now.

How to apply it daily

Today, focus on what is within your control: facts, your actions, your relationships. Avoid getting lost in speculation about the afterlife or 'what ifs'. Act in the real world.