bug#3939: 23.0.96; I can not understant the paragraph in emacs manual.

Below paragraph is in 31.8 Libraries of Lisp Code for Emacs of Emacs
Manual.

When an .el file is in one of load-path, do I need to load it in
.emacs to use it ?

I feel the meaning of the below paragragh is not clear.

Thanks

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 Often you do not have to give any command to load a library, because
the commands defined in the library are set up to "autoload" that
library.  Trying to run any of those commands calls `load' to load the
library; this replaces the autoload definitions with the real ones from
the library.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/usr/share/emacs/23.0.96/etc/DEBUG for instructions.


In GNU Emacs 23.0.96.1 (i686-pc-linux-gnu, GTK+ Version 2.16.1)
 of 2009-07-09 on laptop
Windowing system distributor `The X.Org Foundation', version 11.0.10503000
configured using `configure  '--prefix=/usr' '--build=i686-pc-linux-gnu'
'--host=i686-pc-linux-gnu' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc'
'--localstatedir=/var/lib' '--program-suffix=-emacs-23'
'--infodir=/usr/share/info/emacs-23' '--with-sound' '--with-x'
'--without-toolkit-scroll-bars' '--with-gif' '--with-jpeg' '--with-png'
'--with-rsvg' '--with-tiff' '--with-xpm' '--with-xft' '--without-libotf'
'--without-m17n-flt' '--with-x-toolkit=gtk' '--without-hesiod'
'--without-kerberos' '--without-kerberos5' '--with-gpm' '--with-dbus'
'build_alias=i686-pc-linux-gnu' 'host_alias=i686-pc-linux-gnu' 'CFLAGS=-O2
-march=pentium-m -pipe' 'LDFLAGS=-Wl,-O1''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: en_US.UTF-8
  value of $LC_CTYPE: zh_CN.UTF-8
  value of $LC_MESSAGES: en_US.UTF-8
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=SCIM
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Info

Minor modes in effect:
  TeX-source-specials-mode: t
  show-paren-mode: t
  display-time-mode: t
  global-auto-complete-mode: t
  desktop-save-mode: t
  yas/minor-mode: t
  auto-image-file-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
<help-echo> <down-mouse-1> <mouse-1> <down-mouse-4>
<mouse-4> <down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5>
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1>
<S-down-mouse-1> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-movement> <mouse-movement> <drag-mouse-1> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <double-down-mouse-5>
<double-mouse-5> <down-mouse-5> <mouse-5> <down-mouse-4>
<mouse-4> <double-down-mouse-4> <double-mouse-4> <triple-down-mouse-4>
<triple-mouse-4> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5>
<help-echo> <down-mouse-5> <mouse-5> <help-echo> <down-mouse-1>
<mouse-1> <help-echo> <help-echo> <down-mouse-4> <mouse-4>
<double-down-mouse-4> <double-mouse-4> <triple-down-mouse-4>
<triple-mouse-4> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <down-mouse-4> <mouse-4>
<double-down-mouse-4> <double-mouse-4> <down-mouse-5>
<mouse-5> <double-down-mouse-5> <double-mouse-5> <help-echo>
<help-echo> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <help-echo> <help-echo>
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1>
<help-echo> <down-mouse-1> <mouse-movement> <mouse-1>
<help-echo> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <down-mouse-4> <mouse-4>
<double-down-mouse-4> <double-mouse-4> <down-mouse-4>
<mouse-4> <double-down-mouse-4> <double-mouse-4> <down-mouse-5>
<mouse-5> <double-down-mouse-5> <double-mouse-5> <triple-down-mouse-5>
<triple-mouse-5> <triple-down-mouse-5> <triple-mouse-5>
<down-mouse-4> <mouse-4> <down-mouse-4> <mouse-4> <down-mouse-4>
<mouse-4> <down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5>
<help-echo> <down-mouse-1> <mouse-1> <help-echo> <down-mouse-1>
<mouse-2> <down-mouse-5> <mouse-5> <double-down-mouse-5>
<double-mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <double-down-mouse-5> <double-mouse-5> <triple-down-mouse-5>
<triple-mouse-5> <down-mouse-4> <mouse-4> <double-down-mouse-4>
<double-mouse-4> <triple-down-mouse-4> <triple-mouse-4>
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4>
<triple-mouse-4> <triple-down-mouse-4> <triple-mouse-4>
<triple-down-mouse-4> <triple-mouse-4> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <double-down-mouse-5>
<double-mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5>
<down-mouse-5> <mouse-5> <down-mouse-4> <mouse-4> <double-down-mouse-4>
<double-mouse-4> <triple-down-mouse-4> <triple-mouse-4>
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4>
<triple-mouse-4> <triple-down-mouse-4> <triple-mouse-4>
<triple-down-mouse-4> <triple-mouse-4> <down-mouse-5>
<mouse-5> <down-mouse-4> <mouse-4> <double-down-mouse-4>
<double-mouse-4> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-4> <mouse-4> <help-echo> <down-mouse-8>
<mouse-8> <help-echo> <down-mouse-1> <mouse-1> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5>
<down-mouse-5> <mouse-5> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-5> <mouse-5>
<double-down-mouse-5> <double-mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-4> <mouse-4> <down-mouse-4> <mouse-4>
<double-down-mouse-4> <double-mouse-4> <triple-down-mouse-4>
<triple-mouse-4> <down-mouse-4> <mouse-4> <double-down-mouse-4>
<double-mouse-4> <triple-down-mouse-4> <triple-mouse-4>
<triple-down-mouse-4> <triple-mouse-4> <down-mouse-1>
<mouse-movement> <mouse-movement> <drag-mouse-1> <help-echo>
<help-echo> <help-echo> <down-mouse-1> <mouse-1> <help-echo>
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1>
<down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5>
<down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5>
<mouse-5> <down-mouse-5> <mouse-5> <help-echo> <help-echo>
<down-mouse-4> <mouse-4> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<menu-bar> <help-menu> <send-emacs-bug-report>

Recent messages:
compare-windows: No other window
Mark set [2 times]
No more matching points
byte-code: End of buffer [2 times]
Quit
call-interactively: Text is read-only [2 times]
Quit [4 times]
Mark set
bunzip2ing emacs.info.bz2...done
bunzip2ing emacs-3.info.bz2...done