Renaissance humanism took a close study of the Latin and Greek classical texts, and was antagonistic to the values of scholasticism with its emphasis on the accumulated commentaries; and humanists were involved in the sciences, philosophies, arts and poetry of classical antiquity. They self-consciously imitated classical Latin and deprecated the use of medieval Latin. By analogy with the perceived decline of Latin, they applied the principle of ad fontes, or back to the sources, across broad areas of learning.