Memory is an important thing. But only if the thing that you are remembering is important...just a random bunch of facts and figures is reduced to meaningless lists if there is no purpose. Knowing the phone book by heart may be impressive, but it not reveal a massive niche in the market for that particular skill. Knowing your friends' and family's numbers, on the other hand is more than useful - and not just to win the top prize in 'Who Wants to be a Millionaire?'

The second meeting of Yitzchok and Yosef recalls the importance of memory within a relationship. It is the key to Yosef avoiding temptation. It is the key to Yaakov rediscovering his lost son. It is also the key to understanding how the Jewish people were saved from potential extinction through recalling a former act of faithfulness (as opposed to faith - but that's for another time) on their behalf.

Twice.