2. "Sufism is, in operation, pragmatic."
- Idries Shah, The World of the Sufi: An Anthology of Writings about Sufis and Their Work
6. "...forgetting is vastly underrated as a mental operation."
- Quote by Michael Pollan
10. "Building a project should be a single trivial operation."
- Robert C. Martin, Clean Code: A Handbook of Agile Software Craftsmanship