Help me understand common lisp macros

What can common lisp macros do that can't be done by a function that uses eval and gets quoted arguments?

>> 20

Last time i ran gnus there were only a few, if prersistent, parasites with their overwhelming sense of entitlement.

- Xah Lee, a batshit insane ADHD-ridden gook immigrant crossposting shit and actually getting gullible oldfags (!) responsing to his offtopic shit and flames.
- Certain Clojure evangelist, who has since backed down after we told him we don't take kindly to his Java apologism.
- newLISP fags, who since went back to their web-2.0 BBSes with CSS, AJAX and rounded corners.
- Toady, who finally realized that no one wants to buy his shit ocaml books and no one buys into his bullshit about how "lisp has no pattern matching" and  "static typing is a clear win for productivity".

There are also places like #lisp, where oldfags actually anally rape newfags when they can't recite CLHS and AMOP by heart. And also quite "polite" (in the Naggum sense) like slime-devel and sbcl-devel. See the gmane hierarchy.

Which libraries?

The ones i wrote and people use. I won't use my real name here, of all places.