The people of Israel had come again to the wilderness of Zin.It was hot. It was dry. It was discouraging. They had been here before — forty years earlier, when God had first brought water out of the rock at Rephidim (Exodus 17). Now, at the end of their wandering, they thirst again. And just as before, God was present with them — not as an idea or a symbol, but as a Person. The Rock that followed them was Christ.