Nathaniel Hawthorne said this quote

“ Our first youth is of no value; for we are never conscious of it, until after it is gone. But sometimes--always, I suspect, unless one is exceedingly unfortunate--there comes a sense of second youth, gushing out of the heart's joy at being in love; or possibly, it may come to crown some other grand festival in life, if any other such there be. This bemoaning of one's self. . . over the first, careless, shallow gayety of youth departed, and this profound happiness at youth regained,--so much deeper and richer than that we lost,--are essential to the soul's development. In some cases, the two states come almost simultaneously, and mingle the sadness and the rapture in one mysterious emotion. ”