Have you ever had a moment where you knew, beyond a shadow of a doubt, that you were in the right place? That you were on the right journey? Maybe the sense that you'd crossed a boundary, jumped a hurdle, and somehow, after facing some unconquerable mountain, found yourself suddenly on the other side of it? When the night was warm, and the wind was cool, and a song carried through the quiet streets around you. When you felt the entire world around you, and you were part of it - of the hum of it - and everything was good. Contentment, I suppose, is the simple explanation for it. But it seems more than that, thicker than that, some unity of purpose, some sense of being truly, honestly, for that moment, at home. Those moments never seem to last long enough. The song ends, the breeze stills, the worries and fears creep in again and you're left trying to move forward, but glancing back at the mountain behind you, wondering how you managed to cross it, afraid you really didn't - that the bulk and shadow over your shoulder might evaporate and re-form before you, and you'd be faced with the burden of crossing it again.