I speak from th traditional knowledge in Islam and th knowledge of the saints of Islam.
Joseph (Yusuf in Arabic), peace on him was a prophet, the son of Jacob, the grandson of Isaac and the great grandson of Abraham, the friend of God. They were all prophets of God.
When Joseph was a boy, his brothers asked Jacob to send him with them to play and enjoy himself, as the Qur'an says:
"Send him with us tomorrow to enjoy himself and play, and we shall take every care of him" (Chapter of the Qur'an called Joseph)
"To enjoy himself and to play" means Joseph was trusting. He was not quick to call people liars. Yet, when the brothers took him with them, they threw him in the bottom of the well and left him there.
As an adult, he was accused of having tried to seduce the wife of his king, though he said "God forbid! your husband is my lord! he made my sojourn agreeable." This is the importance of trust.
He was imprisoned. When his innocence was proved, the king, impressed by Joseph, asked that Joseph be brought to his select presence. Joseph sent back the emissary to the king asking that first, the king should enquire about the state of mind of the ladies who were passioned of him. The Qur'an says:
"(The king) said (to the ladies): "What was your affair when ye did seek to seduce Joseph from his (true) self?" The ladies said: "(Allah, God) preserve us! no evil know we against him!" Said the 'Aziz's wife: "Now is the truth manifest (to all): it was I who sought to seduce him from his (true) self: he is indeed of those who are (ever) true (and virtuous)."
Joseph then says, as the Qur'an says:
"This I say in order that he may know that I have never been false to him in his absence, and that Allah will never guide the snare of the false ones."
This is the importance of trust. One must be trustworthy and one must be trusting. By trusting, I mean that one must not be quick to consider people liars.
This is an example of how Satan is fought. But this must be done with the help of God. Without it, there is no chance, Satan will get the upper hand.
I wrote a piece on sura 12, Joseph.
Having compared the bible story of Joseph in the bibles Genesis with the Quran, I can just about follow the story as described in sura 12. But as far as I can see, anyone who did not know the Genesis story could not possibly make sense of the tale of Joseph, as told in the Quran.
In the bible books of Genesis from chapter thirty seven to chapter fifty. the entire fourteen chapters are about Joseph. There are four hundred and fifty verses about the story in the bible, but in the quran sura 12 there are only one hundred and eleven verses.
The quranic version of the bible story of Joseph is a mumbling, incoherent, ill considered, and inaccurate muddle, and it does not even tell you who Joseph is. It just launches into Josephs dream at verse 4, after three verses that attempt to explain the story is being revealed in Arabic, presumably to make it available to Arabs.
The entire sura is peppered with completely unnecessary references to Allah which clutter the narrative, if you can call it a narrative. Because the bible story is clear and lucid, and rich in detail, and it has a comprehensible flow to it.
Sura 12.4 launches into a description of Josephs dream, with no explanation of who he is or how many brothers he has. What is more the dream described is the second of two dreams that are told in Genesis. But the entire point of the dream is that the eleven stars bowing down to Joseph are his eleven brothers. Genesis explains Josephs family tree so you can realize this, but the Quran says nothing about the matter. The Genesis story also says that Jacob made a coat of many colours for Joseph, and that is why his brothers were jealous of him, but the quran gives no reason or motives for Josephs brothers to hate him. Nor does it explain that Joseph has one other brother named Benjamin who had the same mother as himself, but the other ten brothers are step brothers. Nor does sura 12 explain this issue at any time, including when Joseph sends for him from Egypt.
So when Josephs brothers state at sura 12.8 When they said:" Verily Joseph and his brother are dearer to our father than we are, many though we be. Lo! our father is in plain aberration":
This makes absolutely no sense whatever to anyone that has not read the full account in Genesis.
Later in the story Joseph is put in power in Egypt, but sura 12 says nothing about him filling the granaries for seven years, it simply changes the subject to when his brothers amble into Egypt to trade, (sura 12.58) and it does not explain they are there because it is now during the seven years of famine. Then Joseph ask his brothers to send for a brother of who is a son of their father, this again makes no sense without an explanation of the family background.
How much more obvious can it be that the Quran is plagiarism, and it was taken from the Bible and other earlier sources. It is clear to me that Muhammad had Genesis read to him and sura 12 is his half remembered rehash of the story of Joseph.