Music’s trouble and glory is its insubstantiality: insistently communicative yet only vaguely meaningful, powerful and fleeting all at once. The program presented last weekend by the Boston Philharmonic and conductor Benjamin Zander consistently teased the imagination with the various ways it made that elusiveness paradoxically assertive.
The centerpiece was Karol Szymanowski’s Violin Concerto No. 2, written in 1933, the composer’s last major work. Szymanowski’s music has always hovered just outside the classical canon, bearing the hallmarks of cult status: rich but esoteric, vibrant yet indefinable. The Concerto mixes Szymanowski’s exotic palette, his fluid harmonic opulence, with his late devotion to the vigor of Polish folk music. But the most exuberant and forceful phrases still tend to curl into more elliptical charms. The orchestra repeatedly rose to a thrilling blaze — a natural fit for Zander’s theatrical streak — but still harbored secrets just out of reach.