“Beneath the surface of many romances that evolve into partnerships, there is a depth not visible to outside observers.  Elsa and Albert Einstein liked each other, understood each other, and perhaps most important…were amused by each other.  So even if it was not the stuff of poetry, the bond between them was the a solid one.  It was forged by satisfying each other’s desires and needs, it genuine, and it worked in both directions.”  Einstein, Walter Isaakson