‘The music of the future will have to be simple, transparent, naked.’ Ludwig Wittgenstein's thought could serve as a motto for Walter Zimmermann's solo works for viola. The album brings together key compositions that unfold extraordinary intellectual and tonal depth through radical reduction. At the centre is 'Die Sorge geht über den Fluss I + II' (The Care Crosses the River I + II) – recorded in its entirety for the first time. The cycle was written between 1993 and 2000, supplemented in 2024, and is conceived as a musical diary. The first part responds to the early death of a friend, the second follows a trip to India and Zimmermann's own serious illness. Following the principle of ‘nulla dies sine linea’, Zimmermann wrote daily musical entries: condensed lines, fragile gestures, long pauses. The work moves between fullness and emptiness, closeness and distance – a sounding process of grief, reflection and recovery. The ancient myth of ‘care’ that shapes human beings and accompanies them throughout their lives gives the cycle its philosophical dimension. 'Taula' (2003), inspired by Raimundus Lullus, also combines ascending and descending movements of thought in music that balances order and freedom. 'Quattro Coronati' (1999), composed in Rome, reflects on historical and contemporary upheavals – and offers a quiet sign of hope with the image of the apple tree attributed to Luther. Finally, 'Sha-ma-yim – Skies' (2016) opens up the horizon: in shimmering flageolets and ascetic lines, the sky becomes the inner resonance space of the instrument. Zimmermann's music does not impose itself. It demands alert contemplation and trust in the power of the individual tone. The viola, with its sound mediating between earthly roughness and shimmering heights, becomes the bearer of an ‘anima candida’ – a clear, unadulterated voice. Julia Rebekka Adler performs these works with technical precision and spiritual insight. Recorded in the acoustic expanse of the Andreaskirche Berlin-Wannsee, the recording preserves transparency, breath and silence. ‘Skies’ is music as spiritual contemplation – clear, concentrated and of quiet intensity.