Day by day, I learned to experience in some measure the power of God as manifested in the mystery of the passion. Pain and suffering comprised the sacrifice needed in the passion for saving souls. A similar sacrifice had to be undertaken by all those called to the apostolate.

The Marvelous Power Of The Cross | Pope Leo The Great
Our understanding, which is enlightened by the Spirit of truth, should receive with purity and freedom of heart the glory of the cross as it shines in heaven and on earth. It should see with inner vision the meaning of the Lord's words when he spoke of the imminence...