What youthful philosophers and experimentalists we are! There is not one of my readers who has yet lived a whole human life. These may be but the spring months in the life of the race. If we have had the seven-years' itch, we have not seen the seventeen-year locust yet in Concord. We are acquainted with the mere pellicle of the globe on which we live.... We know not where we are. Beside, we are sound asleep nearly half our time. Yet we esteem ourselves wise, and have an established order on the surface. Truly, we are deep thinkers, we are ambitious spirits!