" In the late 1940s, the writer Albert Camus, suffering a bout of tuberculosis, journeyed from war-ravaged Paris to seek warmth and solace in his birthplace of northern Algeria. In a gray, rainy December, he found everything had changed and bitterly recognized the folly of hoping to relive his younger days. And yet he realized that the warm joy of his youth lay still untouched in his memory, writing, “In the depths of winter, I finally learned that within me is an invincible summer. "

― Alex Korb , The Upward Spiral: Using Neuroscience to Reverse the Course of Depression, One Small Change at a Time