He was a familiar figure in public life and had a considerable influence on the anthroposophic movement, particularly through his numerous lectures and his work as an author, which included the first biography of Rudolf Steiner.
He helped establish the first Waldorf School in The Hague, where he also founded a small psychiatric hospital, which soon moved into its own building (now the Rudolf Steiner Zorg).
He spoke often about the effect of color on humans and gave advice to paint manufacturers, architects, directors of museums and artists.
More than a thousand participants gathered in working groups and heard lectures by leading anthroposophists like Eugen Kolisko, Walter Johannes Stein, Elisabeth Vreede and Ita Wegman on their thoughts to the situation of the time.
The internal disputes since the death of Rudolf Steiner and his close collaboration with the physician Ita Wegman in 1935 led to his exclusion and that of the majority of the Dutch members.
He undertook a second journey through South Africa in 1961, visiting the newly established Waldorf schools and other institutions to give advice and hold lectures.