A Quote from St. John of the Cross

An act of virtue produces and fosters in the soul mildness, peace, comfort, light, purity, and strength, just as an inordinate appetite brings about torment, fatigue, weariness, blindness, and weakness. Through the practice of one virtue all the virtues grow, and similarly, through an increase of one vice, all the vices and their effects grow.

John of the Cross, The Ascent of Mount Carmel