Secular morality is the aspect of philosophy that deals with morality outside of religious traditions. Modern examples include humanism, freethinking, and most versions of consequentialism. Additional philosophies with ancient roots include those such as skepticism and virtue ethics. Greg M. Epstein also states that, "much of ancient Far Eastern thought is deeply concerned with human goodness without placing much if any stock in the importance of gods or spirits." An example is the Kural text of Valluvar, an ancient Indian theistic poet-philosopher whose work remains secular and non-denominational. Other philosophers have proposed various ideas about how to determine right and wrong actions. An example is Immanuel Kant's categorical imperative.