CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 2847–2851

2847 The Holy Spirit makes us discern between trials, which are necessary for the growth of the inner man, and temptation, which leads to sin and death. We must also discern between being tempted and consenting to temptation. Finally, discernment unmasks the lie of temptation, whose object appears to be good, a "delight to the eyes" and desirable, when in reality its fruit is death.

God does not want to impose the good, but wants free beings. . . . There is a certain usefulness to temptation. No one but God knows what our soul has received from him, not even we ourselves. But temptation reveals it in order to teach us to know ourselves, and in this way we discover our evil inclinations and are obliged to give thanks for the goods that temptation has revealed to us.

2848 "Lead us not into temptation" implies a decision of the heart: "For where your treasure is, there will your heart be also. . . . No one can serve two masters." "If we live by the Spirit, let us also walk by the Spirit." In this assent to the Holy Spirit the Father gives us strength. "No testing has overtaken you that is not common to man. God is faithful, and he will not let you be tempted beyond your strength, but with the temptation will also provide the way of escape, so that you may be able to endure it."
2849 Such a battle and such a victory become possible only through prayer. It is by his prayer that Jesus vanquishes the tempter, both at the outset of his public mission and in the ultimate struggle of his agony. In this petition to our heavenly Father, Christ unites us to his battle and his agony. He urges us to vigilance of the heart in communion with his own. Vigilance is "custody of the heart," and Jesus prayed for us to the Father: "Keep them in your name." The Holy Spirit constantly seeks to awaken us to keep watch. Finally, this petition takes on all its dramatic meaning in relation to the last temptation of our earthly battle; it asks for final perseverance. "Lo, I am coming like a thief! Blessed is he who is awake."
2850 The last petition to our Father is also included in Jesus' prayer: "I am not asking you to take them out of the world, but I ask you to protect them from the evil one." It touches each of us personally, but it is always "we" who pray, in communion with the whole Church, for the deliverance of the whole human family. The Lord's Prayer continually opens us to the range of God's economy of salvation. Our interdependence in the drama of sin and death is turned into solidarity in the Body of Christ, the "communion of saints."
2851 In this petition, evil is not an abstraction, but refers to a person, Satan, the Evil One, the angel who opposes God. The devil (dia-bolos) is the one who "throws himself across" God's plan and his work of salvation accomplished in Christ.