Thomas a kempis wrote in the Imitation of Christ
Jesus has many who love His Kingdom in Heaven, but few who bear His Cross (Luke 14:27). He has many who desire comfort, but few who desire suffering. He finds many to share His feast, but few His fasting. All desire to rejoice with Him, but few are willing to suffer for His sake. Many follow Jesus to the Breaking of Bread, but few to the drinking of the Cup of His Passion. Many admire His miracles, but few follow Him in the humiliation of His Cross. Many love Jesus as long as no hardship touches them. Many praise and bless Him, as long as they are receiving comfort from Him. But if Jesus withdraw Himself, they fall to complaining and utter dejection.
They who love Jesus for His own sake, and not for the sake of comfort for themselves, bless Him in every trial and anguish of heart, no less than in the greatest joy. And were He never willing to bestow comfort on them, they would still always praise Him and give Him thanks.
Oh, how powerful is the pure love of Jesus, free from all self-interest and self-love! Are they not all mercenaries, who are always seeking comfort? Do they not betray themselves as lovers of self rather than of Christ, when they are always thinking of their own advantage and gain?