Picture one long beam laid clean across the chart, the past at one end and the future at the other, fixed forever a hundred and eighty degrees apart. This is the lunar nodal axis: the south node, the calculated point of the familiar ground every chart already knows, faces the north node, the calculated point of the direction every chart grows toward. The two are no chance meeting but the standing spine of the map, the line any life travels from what it has mastered to what it has not. Behind, the worn and well-known. Ahead, the unmet and the called-for. The whole story runs the length of this beam, and the work is to keep walking it, loosening the old end as you lean into the new.