Beyond the sources and norms of Catholic moral reasoning, what external and internal aids are available to help one pursue one’s proper end? What hindrances does one face in coming actively to know and pursue his/her end?

Beyond the sources and norms of Catholic moral reasoning, what external and internal aids are available to help one pursue one’s proper end? What hindrances does one face in coming actively to know and pursue his/her end? With what resources are these hindrances to be overcome?