The real wisdom here isn't that shared dreams are nice—it's that *loneliness itself* makes dreams feel unreal, even to the dreamer. Lennon is naming something we experience but rarely articulate: when you're isolated with an ambition, your own mind begins to doubt it, to treat it as mere fantasy rather than genuine possibility. The moment another person says "I see it too," the dream graduates from private fantasy to something with weight and consequence. Consider how a startup founder's wild idea stays stuck in their head as impractical daydreaming until one conversation with a co-founder suddenly makes it feel like an actual plan worth pursuing—the dream didn't change, but shared belief transformed its reality.