Elder Joseph the Hesychast:

…Having Christ as ally and armed with the weapons of Faith, Love and Humble-mindedness and of the Precious Cross, we will defeat the invisible and visible enemies…If we wish our salvation, we will find it only in repentance and in our return to God, from whom we departed…If we truly repent, like the Ninevites, we will also be saved, if we don’t repent, we will be sent to perdition…