The oldest girl [his daughter Maro, four and a half years old] did this. She paints like a little bird. And this, the young one [Natasha, two and a half] did. See, she paints on both sides of the canvas. She is more like a passionate plumber. I wish I could paint as freely as they do. There is a gravity of playfulness in their work. If they could only keep it – but they will lose it as they grow older.

'A Painter in a Glass House' (1948)