I guess this is because the rain unleashed by a storm soaks into the earth, nourishing the roots and enabling them to grow even deeper. Compare this to us as human beings. The “storms” that we experience portrayed by the trials and tribulations of everyday life and the “rain” as how we deal with them. By allowing ourselves to absorb and learn from what we are experiencing, we nourish our ability to gain strength in order to make us even stronger so that the next time a “storm” strikes we are more prepared to deal with it. Drink deeply!