Men of his generation were born during Act V * and raised in Act IV. As students, they huddled in a small vulnerable bubble of Act III. The human race has, actually, been in Act V for most of history and has recently accomplished the miraculous feat of assembling splintered planks afloat on a stormy sea into a sailing-ship and then, having climbed onboard it, building instruments with which to measure the world, and then finding a kind of regularity in those measurements. When they were at Cambridge, Newton was surrounded by a personal nimbus of Act II and was well on his way to Act I.