“For last year’s words belong to last year’s language. / And next year’s words await another voice,” writes T. S. Eliot in “Little Gidding,” the fourth poem in his Four Quartets. A new exhibition explores the ways in which Botticelli, Michelangelo, and other old masters inspired the British painter David Bomberg’s early works, helping him to forge a new artistic voice in the key of early-20th-century modernism. —J.V.