regarding 22:60-61 and 25:51

[munir rana]

Dear Forum Members
Salam.

What do you understand by these consecutive verses. I cannot grasp the reasoning of verse 22:61.
22:60  And whoever responds (to injustice) with equivalent of that with which he was harmed and then is tyrannized- Allah will surely aid him. Indeed Allah is Pardoning and Forgiving.
22:61 That is because Allah causes the night to enter the day and causes the day to enter the night and because Allah is Hearing and Seeing.

Another verse here is-
25:51 And if We willed, We could have sent into every city a warner.

Does it mean that We did not send every city a warner. (But in some other verses, so far as i recall, it is stated that Allah sent warner to all community.) Is there any difference between the  use of Lao and In.

Thanks to all.

[deleted]

Perhaps it is to do with how we're often like "what is the reason for this, this, this", and this is our Gods demonstration that the "reason" can be whatever he decides, even if it seems unreasonable?

[deleted]

And such as 35:24 for reference.