Fifth sign of divine omnipotence
Allah Ta’ ala shows the flash of lightning to people in which there is risk of its striking, thus destruction. At the same time, there is a hope for rain following the lightning. The rain does follow with His will and gives rise to numerous types of vegetation. At the end of the verse, it is said فِي ذَٰلِكَ لَآيَاتٍ لِّقَوْمٍ يَعْقِلُونَ (Surely in this there are signs for a people who understand - Ar-Rum 30:24 ⧉), because the mysteries of lightning and rain, and the resultant growth of vegetation can be understood by those with intellect.