On looking over this program of familiar works for cello and piano, the last thing one would call it is challenging. Yet, this past Sunday evening, David Finckel and Wu Han made it into something extremely challenging and enlightening. The duo — a husband-wife team, as is well-known — put so much feeling and energy into each piece that each became a world unto itself, formed by such radically different personalities, that it seemed miraculous that the players could make the transition from one to the other within a single evening. As for listening to such performances, I found myself so deeply immersed in these varied planets, that the journey between them seemed vast. Finckel and Wu Han approached them as differing thought processes in different languages.