Why did it have to be at the top of a mountain on a hot day, carrying all that wood? His father wasn’t young anymore (had he ever been?) so Isaac took the load of wood himself. Abraham went ahead, finding the path, carrying the fire for the altar. This was a long, long way to come to make a sacrifice. Isaac had seen his father make sacrifices to his god before, and it was always the same. He’d build an altar, stone on stone ‘till it was right, lay it with wood – first the tinder, then the kindling, then the fuel. He’d choose the very best lamb he could find, sometimes that took hours, talking to the shepherds, looking at hooves and skin. If he couldn’t find the one he wanted, he’d buy one from a neighbour. That could take a day or two. Once he’d found the one he wanted, he’d tie its legs with rope, lay it on the altar. He’d cut the lamb’s throat quickly so it wouldn’t suffer and light the fire. A complete waste, except it wasn’t. It was a gift, a symbol of...