I’m sure there are many reasons, but the following three hindrances are ones that I have found to be common among many Christians and have had to fight in my own life:
Pride—Like a little child who wants to care for his own needs without help, we sometimes have too high of an opinion of our ability to solve problems. We don’t recognize God’s superior power, and we think we can handle our lives on our own.
Unbelief—Sometimes, we simply don’t believe that God will answer if we did pray. Instead of bringing our requests before the Lord, we worry over them, disregarding the hundreds of promises in God’s Word that He will hear us and help us when we pray.
Busyness—It’s all too easy to fill our lives with important activities and ministry while neglecting the most important activity of seeking God’s face and power.
[by Pastor Paul Chappell - http://www.radicalislive.com/]