The voice drops a little; the tone grows more reverential. Everyone knows; everyone understands. There will be wry allusions to a quest, perhaps even the grail Sacrifice is expected en route; failure (always forgiven: a badge of honour) beckons on every side. Kitted up, your hopes armour-plated?
I might be talking about planting vines on a cleared slope, or simply about taking the corkscrew to a ridiculously expensive bottle of wine, but you all know by