وَأَطِيعُوا ٱللَّهَ وَرَسُولَهُ وَلَا تَنَٰزَعُوا فَتَفْشَلُوا وَتَذْهَبَ رِيحُكُمْ ۖ وَٱصْبِرُوٓا ۚ إِنَّ ٱللَّهَ مَعَ ٱلصَّٰبِرِينَ

Success ensues with the help of God. But God’s help always arrives in this world in the garb of the cause and effect process, and not otherwise. If Muslims prepare themselves as far as possible, fulfilling all the conditions laid down by God for success, then God grants them success after compensating for any shortcomings that they might have. But if they do not exert themselves to the full as commanded by God, He never sends His help in such circumstances. What are these factors which will lead to success? Firstly Muslims should not initiate aggression. Then they should set about strengthening their roots until the enemy comes to attack them. When things reach the stage of a clash, they should prove to be staunch and unflinching, keeping in mind the remembrance of God—in other words, the real goal,—so that their morale may remain intact; they should keep themselves fully organised under the command of their chief, ignoring mutual differences instead of enlarging upon them and becoming divided; they should impress the enemy with their unity; they should exercise patience, i.e., they should adopt a sensible approach instead of being emotional; they should not take any immature step in the hope of quick success; their eyes should be on the final goal and not on immediate gain. Receiving God’s succour is thus a matter of cause and effect. If we are willing to surrender our will wholeheartedly to the will of God, then alone are we held deserving to receive divine succour. The present world is one of trial. Here, God achieves His will from behind the veil of the ‘unseen.’ That is why when He helps the believers, it is done from behind the screen of ‘cause and effect.’ If the Muslims go on taking steps without making preliminary preparations and suffer from differences and dissension, they should never hope that God will appear all of a sudden and solve all their problems on the spot. Even if the Muslims find themselves in better conditions than those of their opponents, it should not happen that, like those who deny the truth they become boastful of their power; fall a prey to haughtiness and ostentation and, in claiming superiority, go to the extent of opposing the call of Truth because it does not suit their whims and fancies.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (8:46)