The Adornment of the Spiritual Marriage, by Jan van Ruysbroeck, , at sacred-texts.com
Of this sensible love is born devotion to God and to His glory. For none can have within his heart the hunger of devotion save him who bears within himself a sensible love of God. Where the fire of love sends up the flames of its desire to heaven, there is devotion. Devotion moves and draws a man, both from without and from within, towards the service of God. Devotion makes body and soul to blossom in nobility and worth before God and before all men. Devotion is demanded of us by God in every service which we ought to do to Him. Devotion purifies the body and the soul of everything that can stop and hinder us. Devotion shows and bestows the right way at blessedness.