There‘s surface water, deep water, big water and small water. Water that moves quickly. Slower water. Water in a cup. There's the water you know about, the water you don't know about, and the water you only assume exists due to indirect evidence like a rumbling sound behind the rock. Cool water, but also warm, and even warmer. Water that gets things clean. Water that only makes things dirtier. Waters both soft and hard. Water in living bodies.