With January comes a welcome end to nonstop Christmas fare and a sterling lineup of classical music, including the chance to hear some of the most soulful, sublime, and profound pieces ever written: the six Unaccompanied Cello Suites of Johann Sebastian Bach. The best interpretations (I’m thinking especially of Pablo Casals, Mstislav Rostropovich, and Yo-Yo Ma, though every great cellist has included these touchstones in his or her repertoire) end up being soul-searching journeys that traverse a wide range of emotion and thought, revealing as much about the artist as about the composer. January 7 at Strathmore, Zuill Bailey, a cellist who produces a rich, exquisite tone and who exudes charm and charisma from the stage, plays the Bach suites in an afternoon concert, before joining Piotr Gajewski and the National Philharmonic for a performance of Haydn’s Cello Concerto No. 1 later that eveningâ€"a sure test of both physical and intellectual endurance. Gajewski also conducts the National Philharmonic in performances of two other masterpieces of the classical era: Beethoven’s driving, intense Grosse Fuge, and Mozart’s final symphony, the Symphony No. 41, known also as the Jupiter.