This document discusses the impact and benefits of open collections at cultural heritage institutions. It begins by quoting James Smithson about the importance of exchange and mutual assistance between naturalists to assemble collections. It then discusses how open access to scholarly articles on the internet has allowed unprecedented sharing of knowledge. Examples are given of how open collections at institutions like museums have led to increased use of collections, new funding opportunities, and greater engagement with the public. Challenges of openness like infrastructure demands and copyright issues are also addressed. The document advocates for making collections as openly accessible and useful as possible to support research, education, and creativity.