Anonymous, A Catechism of Christian Doctrine
“ In what does the strong inclination to evil that is left in us consist? A. This strong inclination to evil that is left in us consists in the continual efforts our senses and appetites make to lead our souls into sin. The body is inclined to rebel against the soul, and the soul itself to rebel against God.Q. 264. What is this strong inclination to evil called, and why did God permit it to remain in us? A. This strong inclination to evil is called concupiscence, and God permits it to remain in us that by His grace we may resist it and thus increase our merits. ”
