God Controls Everything and Plans for the Believers
[8:42] Recall that you were on this side of the valley, while they were on the other side. Then their caravan had to move to lower ground. Had you planned it this way, you could not have done it. But GOD was to carry out a predetermined matter, whereby those destined to be annihilated were annihilated for an obvious reason, and those destined to be saved were saved for an obvious reason. GOD is Hearer, Omniscient.
[8:43] GOD made them appear in your dream (O Muhammad) fewer in number. Had He made them appear more numerous, you would have failed, and you would have disputed among yourselves. But GOD saved the situation. He is Knower of the innermost thoughts.
[8:44] And when the time came and you faced them, He made them appear fewer in your eyes, and made you appear fewer in their eyes as well. For GOD willed to carry out a certain plan. All decisions are made by GOD.
[8:45] O you who believe, when you encounter an army, you shall hold fast and commemorate GOD frequently, that you may succeed.
[8:46] You shall obey GOD and His messenger, and do not dispute among yourselves, lest you fail and scatter your strength. You shall steadfastly persevere. GOD is with those who steadfastly persevere.
[8:47] Do not be like those who left their homes grudgingly, only to show off, and in fact discouraged others from following the path of GOD. GOD is fully aware of everything they do.
God plans for the believers so we have nothing to worry about.
Knowing that God controls everything allows a believer to be in complete peace at all times.
As humans we always love to blame each other and associate blame to others.
God is the Doer of Everything*
[4:78] Wherever you are, death will catch up with you, even if you live in formidable castles. When something good happens to them, they say, “This is from GOD,” and when something bad afflicts them, they blame you. Say, “Everything comes from GOD.” Why do these people misunderstand almost everything?
Nothing Bad Comes From God
[4:79] Anything good that happens to you is from GOD, and anything bad that happens to you is from you. We have sent you as a messenger to the people,* and GOD suffices as witness.
What would a person who believes with 100% certainty that God is running everything?
A person with that kind of belief would never have anything bother them. We would be fully submitting.
[18:66] Moses said to him, “Can I follow you, that you may teach me some of the knowledge and the guidance bestowed upon you?” [18:67] He said, “You cannot stand to be with me. [18:68] “How can you stand that which you do not comprehend?”
In regards to 8:46 when it says not to dispute is this only at the time of war or for all time?
God Defends the Believers
[59:2] He is the One who evicted those who disbelieved among the people of the scripture from their homes in a mass exodus. You never thought that they would leave, and they thought that their preparations would protect them from GOD. But then GOD came to them whence they never expected, and threw terror into their hearts. Thus, they abandoned their homes on their own volition, in addition to pressure from the believers. You should learn from this, O you who possess vision.
[49:10] The believers are members of one family; you shall keep the peace within your family and reverence GOD, that you may attain mercy.