Faces

Why is it that, of all the thousands of faces that we meet during the day, only some faces cause a flash inside our mind? Why is it that some faces end up reminding some special ones from our long-gone past? Why is it that some faces share the same eagerness, the same yearning and the same happiness to steal a glance or two at us, while we end up doing the same? Why is that only some faces exude a subtle sense of happiness every time our eyes cross? Why is it that some faces end up stoking an abundance of platonic affection and a deep sense of veneration within us? Why is it that we feel an intense pull towards some faces even when it is the first - and most probably the only - time that we happen to see them? 

And, finally, why is it that some faces, as they leave, cause a deep pain, at the uncertainty of getting to meet again in this lifetime?!