New York, Museum of Modern Art (MoMA)
https://moma.org/ Kandinsky's artworks in this collection
Related blog posts
19/02/2016 - German Expressionism on MoMA Website
a quote
"The spirit, like the body, can be strengthened and developed by frequent exercise. Just as the body, if neglected, grows weaker and finally impotent, so the spirit perishes if untended."