A quote from chapter 12 of Book II in The Imitation of Christ by Thomas à Kempis:
To many this seems a hard saying: "Deny thyself, take up thy cross, and follow Jesus." (Matthew 16:24) But it will be much harder to hear that last word: "Depart from me, ye cursed, into everlasting fire." (Matthew 25:41)
In the cross is salvation; in the cross is life; in the cross is protection from thy enemies.
In the cross is infusion of heavenly sweetness; in the cross is strength of mind; in the cross is joy of spirit.
In the cross is the height of virtue; in the cross is the perfection of sanctity.
There is no health of soul nor hope of eternal life but in the cross.