It was on an aeroplane that Adam Feinstein first heard that his son Johnny, the youngest of his three children, was autistic. In the way that it is often easier to open up to someone you have never met and will probably never see again, Feinstein found himself telling the man next to him about something that was giving him great cause for concern.

Steven Isserlis is probably Britain's best-loved and most highly respected solo cellist. At 51, with his distinctive mop of curls and a family tree that takes in figures as diverse as Rabbi Moses Isserlis, Felix Mendelssohn, Karl Marx and Helena Rubinstein, he has been at the forefront of British musical life over several decades.

As a cellist his tone is remarkable - indeed, unmistakable: he has long preferred to use gut strings, which give his sound a burnished, soulful timbre rather than the harsher, sock-it-to-'em quality of the metal strings employed by most big-time soloists.

Natalie Clein once said her pet hate is getting on an aeroplane with her cello, and people asking her why she does not play the flute. But almost as irritating for the world-renowned cellist is the suggestion that classical music is elitist.

Her green eyes blaze and her back stiffens. "When anyone says the word 'elitist' I can feel myself starting to bristle. I want everyone to come to my concerts," she exclaims.

Robert Wistrich, often described as the leading expert on the history of antisemitism, has a new book out on the subject - a 1,100-page brick of a book, in fact. Variously described as a "history" or "encyclopaedia", Wistrich's Lethal Obsession: Anti-Semitism From Antiquity to the Global Jihad is actually more a lengthy exposition of the ideas behind anti-Jewish hatred - their origins and particularly their cancerous spread through the contemporary world.

It is a sunny morning in Soho. On the hotel terrace where Howard Jacobson is eloquently considering what it means to be a Jew, the clinking of coffee cups and the odd Yiddish imprecation mingle with the sights and sounds of London’s most cosmopolitan strip of earth.

Thematically and literally, this is familiar territory. Many have been the discussions with this most articulate of writers trying to identify the elusive essentials of being Jewish. And, however much this feels like putting up a tent in a hurricane, it is always stimulating, always fruitful.

‘Mahler helps us make sense of our modern world,” explains Norman Lebrecht. “Uniquely, he is a composer who was derided in his lifetime, ignored for decades afterwards but ultimately displaced Beethoven at the box office.”

At 62, Lebrecht is one of the world’s most prolific and widely read commentators on music and culture. Before immersing himself in the arts, he studied Talmud and rabbinic debate — knowledge which has stood him in very good stead, especially when it comes to Mahler, whose 150th anniversary is being celebrated this year.

Justin Bartha may not be a household name, but the 31-year-old outshone J-Lo and Ben Affleck in Gigli, played the missing groom in 2009's surprise comedy hit The Hangover, and provided Nicolas Cage with a wise-cracking sidekick in the family-oriented National Treasure adventures National Treasure. If you still cannot put a face to the name, then his latest film (not to mention its poster), The Rebound, should change that.

She is president of an international festival, founder of the world's leading piano competition and a world-renowned teacher who will work in Washington, Seoul, Beijing, Hanover and Leipzig this year alone. At the age of 90, Dame Fanny Waterman shows no sign of slowing down.

Tate Director Sir Nicholas Serota is for many one of the most important and influential people in art, regularly securing a top three placing in Art Review's annual list of the art world's most powerful figures. But he is also subjected to virulent criticism from a number of quarters, in particular from the Evening Standard's provocative art critic Brian Sewell, who regularly uses his column to lambast him for "furthering so many worthless careers".