ויוסף הורד, although this had been mentioned already, it is mentioned again as the narrative continues now to concentrate on what happened to Joseph.

ויהי ה' את יוסף ויהי איש מצליח, he was successful in all things he undertook on his own behalf and also was successful in the house of his Egyptian master. Every task that was assigned to him he managed to carry out successfully.

וימצא.יוסף חן...וישרת אותו, because Joseph had found so much favour in his eyes he appointed him as his exclusive personal valet. At the same time he appointed him in charge so that without Joseph’s approval nothing could be done within this household.

וכל יש לו, all that he owned.

ולא ידע אתו מאומה, he did not involve himself in anything concerning the affairs of his household. Everything rested on Joseph’s shoulders. Everything that needed to be done in the household other than matters relating to the food served in the house. The reason why Joseph was not charged with this relatively minor task was the fact that he was from a different people. We know already from 43,32 that the family of Yaakov, loosely known as העברים, “the Hebrews,” (from the sticks, i.e. a culture beyond the Euphrates river) had such different eating habits that the Egyptians could not eat at the same table with them. Joseph had not changed his eating habits. Other commentators interpret the line כי אם הלחם אשר הוא אוכל, as a euphemism applying to Potiphar’s wife.

ויהי יוסף יפה תואר, the reason why the Torah mentions that Joseph was handsome is only to help us understand why a highly placed person such as Mrs Potiphar would try to get involved with a foreign-born slave. Joseph was so handsome in appearance. We already explained the nuances of the word יפה תואר and יפה מראה respectively in connection with Rachel (29,17).

ויהי אחר הדברים האלה, after Joseph had been in the house of his Egyptian master for some time and had occupied the highest position in that household, feeling very secure, the invitation of a romantic relationship with Mrs. Potiphar brought tension into his life again. He had, of course, no way of knowing at the time that these developments had as its purpose that he would in due course rise to far higher prominence and that he would become the direct instrument of bringing his family to Egypt where they would reside in comfort and found a nation. Also the sin of the Chief butler and Chief baker respectively, as well as their being held in the same jail as Joseph and his becoming their valet, were all part of G’d’s design to further His plans without interfering with anyone’s free choice. We have to learn from this whole story that when a person suffers a setback in life, one that appears to him undeserved, he must remember how all these setbacks worked in Joseph’s favour at the time although he was not yet aware of it. We must therefore trust that G’d has our best interests at heart at all times, even though we cannot always appreciate this at the time when we are being tested. The incidents were narrated at this point to demonstrate Joseph’s righteousness when on his own without family support, after having in effect been cast out from his family.

וימאן, the meaning is clear beyond mistake.

איננו גדול בבית הזה, there is no one in this house who is superior to me in rank except you who are out of bounds to me inasmuch as you are my master’s wife; how could I abuse the trust placed in me by my master?

כי אם אותך באשר את אשתו; these words lend support to the words of the Midrash which saw in the words כי אם הלחם a euphemistic reference to Potiphar’s wife. It is also possible that Potiphar had warned Joseph specifically against getting involved with his wife because he was so handsome. There was no need for the Torah to spell out such a prohibition

ואיך אעשה הרעה הגדולה הזאת, to sleep with his wife and to betray his trust? Furthermore, this would not only be a grievous wrong against my master, but it would also be a sin against G’d Who commanded man certain rules of sexual behaviour. (we explained these rules in connection with Genesis 2,24 on ודבק באשתו)

לשכב אצלה להיות עמה, she lowered her demands, even to at least lie down on the same bed beside her, or merely keeping her company. Joseph refused all these suggestions. According to an aggadic interpretation, the apparent repetition of the line לשכב אצלה להיות עמה refers to intimacy in this world on earth, לשכב אצלה, and the spiritual equivalent in the world to come, i.e. להיות עמה. (Sotah 3)

ויהי כהיום הזה, a day, quite similar to this day, when she insistently urged him to sleep with her, occurred. Now a different day occurred when the house was empty of all its other occupants

לעשות מלאכתו, to perform specific chores which were part of his regular routine assigned to him, as explained by Onkelos.

ותקרא לאנשי ביתה, how is that possible seeing that none of them were in the house at the time?ואקרא בקול גדול.ותאמר..לאמר, to tell her husband.

הביא לנו, they said to him (accusingly) how he could have brought such a man.

בנו, a word denoting glory, i.e. how could he be “over us, in a superior position?”