To get a high ranking in Google result pages, a URL [1] must have links that point back to it. But be carefull, as search engines will catch you if you're using too much links on your pages. If you use 100 or more links on the same page, Google will consider it as web spam [2], even on your internal pages : such webpages really look like doorway pages.
But if you use your common sense and the Google SEO information for webmasters [3], you won't have any problem. Do you ?
- SEwatch forums [4]: Internal Links are responsible for spamming [5]
- Google [6] : Information for Webmasters : Search Engine Optimizers [7]