I have just published a page that is an introduction to The Four Noble Truths. They are the first utterances of the Buddha after his enlightenment and probably the most important words he ever said. The page is available on the right navigation bar but if you click The Four Noble Truths it will take you straight there.

The page also includes a link to the original Sutta, the Dhamma­cakkap­pa­vat­ta­na­sutta, which can also be downloaded as a PDF.