The office humbles you. You're reminded daily that in this great democracy, you are but a relay swimmer in the currents of history, bound by decisions made by those who came before, reliant on the efforts of those who will follow to fully vindicate your vision. But the presidency also affords a unique opportunity to bend those currents -- by shaping our laws and by shaping our debates; by working within the confines of the world as it is, but also by reimagining the world as it should be.