What is the difference between the Four Noble Truths and the Two Truths (relative and absolute truth)? The Two Truths delineate the doctrinal view on phenomena whereas the Four Noble Truths, though also contain some elements of that view, focus mainly on the practicable ways to attain liberation. Therefore, both are very important Buddhist doctrines that can lend certain help to one’s practice if understood well. Of course, one may choose to learn only the theories necessary for undertaking specific practice rather than the more extensive knowledge of various Buddhist doctrines such as the Two Truths or the Four Noble Truths. But the chances are one may be prone to mistakes more easily this way except for those with the sharpest faculties.
[Excerpt from Luminous Wisdom Book Series ~ The Right View : The Four Noble Truths]