Just the simple use of /write and $read

Code:
on *:TEXT:!addnewquote *:#:{
if ($read(quotes.txt,w,$2-)) { msg $chan This quote already exists!
halt
}
else {
/write quotes.txt $2-
msg $chan The Quote has been successfully added.
}
}

on *:TEXT:!delquote *:#:{
if (!$read(quotes.txt,w,$2-)) { msg $chan This quote doesn't exist!
halt
}
else {
/write -ds $+ $2-
msg $chan The Quote has been successfully deleted.
}
}

"In order to succeed, your desire for success should be greater than your fear of failure."