The words “great” and “world class” are all too frequently bandied about in reviews and articles about musicians (and artists and writers too). But how does one truly define these over-used descriptions? If “greatness” comes from a life spent living with, and performing and writing about, some of the finest music ever written, forming a profound relationship with it and its composers, understanding with intimate detail its structures and nuances, then Paul Badura-Skoda is a living example of this.

Paul Badura-Skoda is a pianist I have long wanted to hear live. I was aware of him more as a respected pedagogue, writer on music and editor of works by Mozart, Beethoven and Chopin and others. My teacher frequently refers to him, I have met pianists who have studied with him, and I have listened to some of his recordings (including his latest in which he plays Schubert’s final sonata on three different pianos) with interest and curiosity.

His concert at St John’s Smith Square was an opportunity for me and my companion for the evening (a fellow pianist) to share a unique musical experience – and one which will resonate with us for a long time to come. To attempt to “review” the playing, the pianism, the musical understanding and insight of such a master would be churlish.

Badura-Skoda created a special and intimate soundworld and atmosphere from the opening notes of the bittersweet A minor Waltz to the life-affirming closing cadence of Schubert’s final Piano Sonata, a place where generosity of spirit and good humour ruled, a place of great intimacy, as if we had been invited into his own musical salon for the evening. Of course, Paul Badura-Skoda is steeped in that particular European tradition of music-making, and his teacher, Edwin Fischer, connects him to an earlier golden age of music making and culture.

Despite his age (86), Badura-Skoda cuts a sprightly figure (compare his twinkling eyes and brisk gait with the frailer Maurizio Pollini at the Queen Elizabeth Hall in April, who is more than 10 years Badura-Skoda’s junior) and displayed an obvious pleasure in being at St John’s Smith Square. And if there were some smeared notes and uncertain rhythms, the overall effect was of a musician who has lived with this music for many years and whose knowledge and understanding allowed the music to speak for itself, free of ego and unnecessary gestures.

Before the Sonata in B flat, D960, Paul Badura-Skoda said a few words about the piece, how he regarded it as Schubert’s “farewell” (it was completed less than two months before the composer’s death in 1828), and how the sublime opening theme suggests the words of a hymn or prayer. The first movement had a spacious serenity in the main theme, and the range of colours and nuances which Badura-Skoda brought to the music shone a new light on a familiar work for me: for example, the bass trills were voiced differently each time which gave them a greater resonance and sense of foreboding, and the exposition repeat was observed. The slow movement’s ominous tread was relieved by a middle section of great warmth. The third movement bubbled with all the exuberance of a mountain stream, the darker Trio hardly interrupting the mood, while the finale had drive and energy coupled with wit and humour, despite one or two uneven moments. This was an engaging and entirely satisfying performance, which was met, deservedly, in my opinion, with a standing ovation.