« St. Augustine assures us that there is no spiritual exercise more fruitful or more useful than the frequent reflection on the
sufferings of our Lord. Blessed Albert the Great, who had St. Thomas Aquinas as his student, learned in a revelation that by simply thinking of or meditating on the passion of Jesus Christ, a Christian gains more merit than if he had fasted on bread and water every Friday for a year, or had beaten himself with the discipline once a week till blood flowed, or had recited the whole Book of Psalms every day» ("The secret of the rosary" by Saint Louis Marie Grignion De Montfort, Twenty-eighth Rose, n. 88)
St. Paul said that his sole ambition was to know the science of the cross, referring to the love that it contains: “For I resolved to know nothing while I was with you except Jesus Christ and him crucified (1 Co 11,2)".
When Saint Bonaventure was asked where he got the copious and abundant doctrine that was found in his works, he said, showing a crucifix: “This is the book that tells me everything I write. Here I have learned all I know”.
2 Cor 13:13