Texts are patient conversationalists always waiting for you to write your side of the conversation into the margin before they continue on with their side of the conversation. Sadly, too many readers (students especially) don't realize that there's a conversation going on.

Link to:<br /> - https://hypothes.is/a/bBwyhkN3Ee6nQNPI5xmSnQ - https://hypothes.is/a/GvRApkN3Ee6LbBPqqX-A5Q

Margins in books and on paper are blank spaces for "dark ideas" asking to be filled in while "reading with a pen in hand" so that the reader can have a conversation with the text.

Link to https://hypothes.is/a/GvRApkN3Ee6LbBPqqX-A5Q on dark ideas

Indigenous cultures can "see" dark constellations (example: the Australian emu in the sky) which are defined empty spaces which are explicitly visible.

Using this concept, one could think of or use blank index cards in a zettelkasten or even the empty (negative) spaces between cards as "dark ideas" (potential ideas which need to be thought of and filled in).

Link to: https://hypothes.is/a/FlqusEN1Ee6XEr_9StPUlA