Surat Ar-Ra`d (11-12)

{لَهُ مُعَقِّبَاتٌ مِّن بَيْنِ يَدَيْهِ وَمِنْ خَلْفِهِ يَحْفَظُونَهُ مِنْ أَمْرِ اللّهِ إِنَّ اللّهَ لاَ يُغَيِّرُ مَا بِقَوْمٍ حَتَّى يُغَيِّرُواْ مَا بِأَنْفُسِهِمْ وَإِذَا أَرَادَ اللّهُ بِقَوْمٍ سُوءاً فَلاَ مَرَدَّ لَهُ وَمَا لَهُم مِّن دُونِهِ مِن وَالٍ} (الرعد : 11)

11- Allah has angels who come alternatively in the morning and at night, so when the angels of the night go, the angels of the day comes and vice-versa. Those angels remain in front of people and from behind to protect them by the command and permission of Allah, but when fate comes, they leave them to face their destiny.

Verily, Allah does not change a favor or good health to the opposite until the people do evil, and He does not change their humiliation until they hold firm with the causes of glory and victory. So, Allah changes their conditions according to the conditions of their souls and actions.

When Allah wills to inflict people with a disease, poverty, defeat or any other kind of affliction, no one is able to reject His Command, and they shall have no guardian or helper to defend them against affliction.

{هُوَ الَّذِي يُرِيكُمُ الْبَرْقَ خَوْفاً وَطَمَعاً وَيُنْشِئُ السَّحَابَ الثِّقَالَ} (الرعد : 12)

12- Indeed, Allah shows you the lightning to fear Him, sends down much rain to overwhelm you with water so that you would seek His Help and invoke Him. Or you travel and hope for the mercy of Allah and the blessing of rain and its use. It is He who creates thick clouds which bear water for your own use.