ויפל על צואריו ויבך על צואריו
The meeting of father and son was certainly an emotionally-powered reunion. The love they manifested towards one another was unusual. This, coupled with the twenty-two year forced separation, created a situation in which their first encounter was a heightened opportunity for intense expression of love. This is why Rashi quotes Chazal, who say that it was only Yosef who hugged and kissed his father. Yaakov Avinu, at that exalted moment – instead of embracing his son – was reciting Shema Yisrael. Then Yaakov concluded the meeting with, Amussa ha’paam, acharei re’osi es panecha, “Now that I have seen your face…