Sometimes the Spirit of God not only furnishes light for your mind and hell-fire in your conscience, but heaven-fire in your affections. From the Word He makes Christ so visible in His excellencies and sufficiency for all your needs that your affections begin to desire Him. These glimpses of Jesus and of God’s mercy through Him are so luscious that you begin to taste sweetness in hearing of them, which stirs up further desire in you so that finally you must have the desire of your heart: ‘I must have Christ!’