What is my main obstacle to living a Christian life, and how can I overcome it?

I think the hardest part for me is going through a real and heartfelt prayer. In school, home, and wherever, usually I pray without really trying to communicate with God. Truly I feel silence is the best way to do so. My priest pointed out the other Sunday that usually whenever we are angered or saddened to the point of crying, silence usually calms us. How mysterious...