The Heidelberg Catechism: Lord's Day 52
127. Question: What is the sixth petition?
Answer: And lead us not into temptation, but deliver us from the evil one. That is: In ourselves we are so weak that we cannot stand even for a moment. Moreover, our sworn enemies-- the devil, the world, and our own flesh-- do not cease to attack us. Wilt Thou, therefore, uphold and strengthen us by the power of Thy Holy Spirit, so that in this spiritual war we may not go down to defeat, but always firmly resist our enemies, until we finally obtain the complete victory.
 Ps. 103:14-16; John 15:1-5.  II Cor. 11:14; Eph. 6:10-13; I Pet. 5:8.  John 15:18-21.  Rom. 7:23; Gal. 5:17.  Matt. 10:19, 20; 26:41; Mark 13:33; Rom. 5:3-5.  I Cor. 10:13; I Thess. 3:13; 5:23.
128. Question: How do you conclude your prayer?
Answer: For Thine is the kingdom, and the power, and the glory, for ever. That is: All this we ask of Thee because, as our King, having power over all things, Thou art both willing and able to give us all that is good, and because not we but Thy holy Name should so receive all glory for ever.
 Rom. 10:11-13; II Pet 2:9.  Ps. 115:1; Jer. 33:8, 9; John 14:13.
129. Question: What does the word Amen mean?
Answer: Amen means: It is true and certain. For God has much more certainly heard my prayer than I feel in my heart that I desire this of Him.
 Is. 65:24; II Cor. 1:20; II Tim. 2:13.