“If you will follow My statutes... I will give you rains in their proper time.”
We need to understand these words, for it seems that God is greasing Israel with words, and is trying to convince, almost to seduce them, by saying “If you will do so-and-so, you will have this and that.” Another thing that we need to understand is why God is promising only physical blessings.
However, here we have a hint to the reincarnation. As is known, the reincarnated soul may begin in two inanimate states, silent (earth) and sprouting (vegetation). Then it may become a living animal and if it deserves, a human, and in that state it can achieve perfection, in its appointed time.
That is why the Torah said, “If you will follow my statutes, I will give rain in its proper time, the earth will produce vegetables, and trees will grow fruit, and you will eat and be satisfied.” The souls that are found in nature will ascend and be elevated to the level of man. That is why the Torah continues, “and you will eat bread to satiety, and you will live securely in your land.” The wise student will understand.
Art: Paul Gauguin - Tropical Vegetation