ויבכו אותו מצרים, not only out of respect for Joseph and because of his decree of public mourning, but also because he was revered for his name Yisrael and what this name stood for. He deserved the same respect as royalty.

וידבר יוסף אל בית פרעה, he used intermediaries as a mourner in garments of mourning is not allowed to appear so before the King

ויעלו אתו, voluntarily, not because Joseph had so commanded.

זקני ביתו וכל זקני ארץ מצרים, seeing that Yaakov had been considered one of the wise men even in the eyes of the Egyptian intellectual elite. (compare Psalms 105,22 וזקניו יחכם”and to teach his elders wisdom.”)

גם רכב גם פרשים. In the eyes of the military Yaakov had been considered an able general so that they paid him this last honour

ויצוו אל יוסף, they commanded Yaakov’s servants or outsiders concerning Joseph. We find a similar construction in Exodus 6,13 ויצום אל בני ישראל, where G’d commanded Moses and Aaron to address the Israelites.

לאמר אביך צוה, he commanded that we should say what we have to say as something that originated with us and not with him, as he did not think for a moment that you might want to avenge yourselves on us. However, he consented that if we were worried, we could take the initiative and express our concerns to you.

לפני מותו, so closely before his death that we could not speak to you about this at that time.

ויבך יוסף, when they mentioned their father and the fact that he had not thought him capable of holding a grudge and acting upon it

התחת אלוקים אני, while it is true that I am a judge, a surrogate of His, charged with the task of carrying out His decrees, and I could punish anyone who was empowered by Him to carry out His decrees. This is analogous to the principle that one court must not annul the rulings of a previous court on the same subject.” (Eduyot 1:5) It is true that you had been charged by G’d to carry out His decrees, but you did not send me here deliberately but G’d. (Genesis 48:8)

ואתם חשבתם עלי רעה, you had mistakenly considered me as a רודף, someone threatening your very lives. Had you not erred, your actions would have been perfectly justified.

אלקים חשבה לטובה, G’d exploited your error for something good.

ויחנטו אותו ויישם בארון, in the very same casket in which the embalming had taken place. They placed his remains therein and he was never interred in the earth. This is why his casket remained well known throughout the generations. Until “Moses took the bones of Joseph, etc.” (Exodus 13,19)