While the soul is in mortal sin, nothing can profit it; none of its good works merit an eternal reward, since they do not proceed from God as their first principle, and by Him alone is our virtue real virtue.
Teresa of AvilaWe cannot be sure if we are loving God, although we may have good reasons for believing that we are, but we can know quite well if we are loving our neighbor. And be certain that, the farther advanced you find you are in this, the greater the love you will have for God.
Teresa of Avila