Quote by Igor Stravinsky

My freedom will be so much the greater and more meaningful the more narrowly I limit my field of action and the more I surround myself with obstacles. Whatever diminishes constraint diminishes strength. The more constraints one imposes, the more one frees one's self of the chains that shackle the spirit.

Please suggest source details if you know: book, page, year, online article address (url), correction (different author...), etc.. Thanks.