The writing tool affects the choice of words and, by extension, the thought itself. With a pencil you can rest the tip on the paper and you can erase its trace

The writing tool affects the choice of words and, by extension, the thought itself. With a pencil you can rest the tip on the paper and you can erase its traces, but it has lateral drag and requires some downward force. The fountain pen requires no force, but you can't rest it on paper or it makes a huge blotch. You can't even leave it uncaped for very long, so it kinda forces you to be writing. The computer allows searching, copying and pasting, but every minor alteration in font or typeface requires cooperation from the software.