Read it through once

This is the source of the erroneous excesses of Remorse and Revenge; the one extending itself over the future, and the other over the past; provinces in which their suggestions can only be the sources of evil. The purpose of a resolution to act more wisely and virtuously in future, and the sense of a necessity of caution in repressing an enemy, are the sources from which the enormous superstitions implied in the words cited have arisen.]