******A beautiful, intimate and inspiring investigation into how we can find and nurture within ourselves that essential quality of internal happiness - the 'light within' that Julia Baird calls 'phosphorescence' - which will sustain us even through the darkest times.**Over the last decade, we have become better at knowing what brings us contentment, well-being and joy. We know, for example, that there are a few core truths to science of happiness. We know that being kind and altruistic makes us happy, that turning off devices, talking to people, forging relationships, living with meaning and delving into the concerns of others offer our best chance at achieving happiness. But how do we retain happiness? It often slips out of our hands as quickly as we find it. So, when we are exposed to, or learn, good things, how do we continue to burn with them?And more than that, when our world goes dark, when we're overwhelmed by illness or...