The years between thirty-five and sixty-five revolve before the passive mind as one unexplained, confusing merry-go-round. True, they are a merry-go-round of ill-gaited and wind-broken horses, painted first in pastel colors, then in dull grays and browns, but perplexing and intolerably dizzy the thing is, as never were the merry-go-rounds of childhood or adolescence; as never, surely, were the certain-coursed, dynamic roller-coasters of youth. For most men and women these thirty years are taken up with a gradual withdrawal from life.