St. Alphonsus Liguori

St. Alphonsus Liguori on Devotion to the Passion

From chapter five of The Holy Eucharist.
Who can deny that, of all devotions, devotion to the Passion of Jesus Christ is the most useful, the most tender, the most agreeable to God, one that gives the greatest consolation to sinners, and at the same time most powerfully enkindles loving souls? 
Whence is it that we receive so many blessings, if it be not from the Passion of Jesus Christ? 
Whence have we hope of pardon, courage against temptations, confidence that we shall go to heaven? 
Whence are so many lights to know the truth, so many loving calls, so many spurrings to change our life, so many desires to give ourselves up to God, except from the Passion of Jesus Christ? 
The Apostle therefore had but too great reason to declare him to be excommunicated who did not love Jesus Christ. If any man love not our Lord Jesus Christ, let him be anathema.