“When the well is dry, we know the worth of water.”

This is a favorite quote of one BENJAMIN FRANKLIN, (1706-1790) as recorded in Poor Richard’s Almanac, 1746

Perhaps Leonardo Da Vinci put it best, though, when he said: “Water is the driving force of all nature.”
Another favorite: “All the water that will ever be is, right now.” --National Geographic, October 1993