If you walk in my statutes, and keep my commandments, and do them;…
To understand the philosophy of this beautiful and often sublime phenomenon, so often witnessed since the creation of the world, and essential to the very existence of plants and animals, a few facts derived from observation and a long train of experiments must be remembered.
1. Were the atmosphere everywhere at all times at a uniform temperature, we should never have rain, or hail, or snow; the water absorbed by it in evaporation from the sea and the earth's surface would descend in an imperceptible vapour, or cease to be absorbed by the air when it was once fully saturated.
2. The absorbing power of the atmosphere, and consequently its capability to retain humidity, is proportionably greater in warm than in cold air.
3. The air near the surface of the earth is warmer than it is in the region of the clouds. The higher we ascend from the earth the colder do we find the atmosphere. Hence the perpetual snow on very high mountains in the hottest climate. Now, when from continued evaporation the air is highly saturated with vapour, though, if it be invisible and the sky cloudless, if its temperature be suddenly reduced by cold currents descending from above, or rushing from a higher to a lower latitude, its capacity to retain moisture is diminished, clouds are formed, and the result is rain. Air condenses as it cools, and like a sponge filled with water and compressed, pours out the water which its diminished capacity cannot hold. How singular, yet how simple, the philosophy of rain! Who but Omniscience could have devised such an admirable arrangement for watering the earth?
Parallel VersesKJV: If ye walk in my statutes, and keep my commandments, and do them;