Part of the sadness and elegiac quality of something like commencement is that we remember what it was like to be young and free, "Golden in the mercy of his means," with the world as our oyster. We lament that we've lost the sense of adventure, bravery, and risk that electrified those long lost days. And yet the truth is we need not abandon such things. We should be lifelong learners, career explorers, always re-imagining the world and discovering its wonders anew.