"Mendoza was a little man; puny, you might say. But that was not the reason he took two Dilantin every day. Nor was it the reason that he carried with him quantities of multivitamins, which he ate like candy throughout the tedious days and sleepless nights. The puniness may have been the effect, rather than the cause. In any case, you noticed the smallness of the man right away. What you didn't notice at first was the other thing...the indefinable thing that made you forget about him as soon as he passed out of your field of vision. It was as though you saw him but that he wasn't really there amidst the bus passengers when you looked away, and it wasn't your eyes fell upon him later that he became real. That thing, whatever it was, Mendoza knew. And he tolerated it."