Your first determination must be a deep and unshaken resolution never to commit mortal sin, for it can only rob us of the grace and friendship of God. Such a resolution is the basis of a virtuous life. As long as the soul perseveres in it she possesses Divine charity, which makes her a child of God, a member of Christ, a temple of the Holy Ghost, and gives her a right to the blessings of the Church here and the kingdom of Heaven hereafter.
--Louis de Granada, The Sinner's Guide
