Wilhelm Kempff’s letter on Biret 12 January 1976: [Idil Biret, this genial pianist and composer belongs to the class of the elite musicians of our time. I have followed her development from the days when – as a seven year old child – she played for me in Paris. She is one of those phenomenal musicians – and in this respect comparable to Yehudi Menuhin – who traverse the way from a child prodigy to mature artist and musician without suffering any impairment. Above all her lively interests in literature, plastic arts and philosophy indicate that she will also be a pedagogue which could have been wholly foretold from her human qualities.]