Sebastian Petrycy

[2] Petrycy published his Polish translations of Aristotle's practical works, the Ethics, Politics and Economics, together with his own extensive commentaries.

In these, he laid stress, in the theory of knowledge, on experiment and induction; in psychology, on feeling and will; and in politics, he preached democratic ideas.

His interest in practical questions and his linking of philosophical theory with the needs of national life was a feature common to Petrycy and to leading Polish thinkers of periods that were to follow.

[6] Petrycy practiced medicine in Lwów and at the side of Wojewoda Jerzy Mniszech, whom he accompanied to Moscow in 1606.

[8] His medical writings, which included "De natura, causis, symptomatis morbi gallici eiusque curatione...",[9] combined deductive reasoning with observation and experiment.