“The man who turns away from the truth lest he should get to know it, will not receive answers to prayer.” (Proverbs 28:9)
1. Refusing to hear the truth (Prov. 28:9)
2. Tempting or provoking God (Dt. 3:26)
3. Lack of charity or love to others (Prov. 21:13)
4. Lack of humility (2 Chron. 7:14)
5. A hardened heart (Zech. 7:12, 13)
6. Forsaking God (2 Chron.15:2)
7. Praying amiss (wrong motives) (James 4:3)
8. Regarding iniquity (Ps. 66:18)
9. Unbelief (Mt. 17:20,21; Mt. 21:22)
10. Marital strife (I Pet.3:7)
11. Parading your prayer-life (Mt. 5:6)
12. Sin (Ja. 4:1-5; Is. 59:2; John 9:31)
13. Vain (useless) repetitions. (Mt. 6:7)
14. Being discouraged (Lk. 18:1-8)
15. Doubt and double-mindedness (Ja. 1:5-8)
16. Anxiety and worry (Phil. 4:6)
17. Hypocrisy (Lk. 18:9-14)
18. Unforgiveness (Mt. 6:14, 15; Mk. 11:25, 26)
19. Not tithing (Mal. 3:8,9,10)
20. Rebellion against God’s Word (Prov. 1:24-28; Zech. 7:11-14)
21. Presumption and pride (Luke 18:10-14)
22. Unconfessed sin (Ps. 66:18)
23. Demonic attack (Daniel 10: 10)
24. Lack of sincerity (Mt. 6:5)
25. Being unsaved (an unbeliever) (John 17)
26. Curses (Deut. 28)
27. Willful stubbornness (Jer. 16:12,13)
Source: http://persecutedchurch.info/2012/03/29/27-reasons-for-unanswered-prayer/
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