Epicureanism is commonly regarded as the refined satisfaction of physical desires. As a philosophy, however, it also denoted the striving after an independent state of mind and body, imperturbability, and reliance on sensory data as the true basis of knowledge. Epicurus (ca. 341-271 B.C.) founded one of the most famous and influential philosophical schools of antiquity. In these remains of his vast output of scientific and ethical writings, we can trace Epicurus' views on atomism, physical sensation, duty, morality, the soul, and the nature of the gods.