I think of the rivers and the pools like the ways of God that have dug deep into the valleys of our souls from the runoff of mountain experiences to carry us thru the drought of hard times. His provisions for us like the cisterns in the desert.
The wisdom given to mankind is vanity of vanities compared to the wisdom Christ is made for us! Prayer is always for the latter rains that follow the former. The upper and nether springs hold such moisture in times when the clouds hold no rain.