Matthew 17:14-21

1. We see in these verses is a lively emblem of the dreadful influence sometimes exercised by Satan over the young.
2. We see in these verses a striking example of the weakening effect of unbelief.
3. We see in these verses that Satan's kingdom is not to be pulled down without diligence and pains.

"Faith is the key to success in the Christian warfare. Unbelief is the sure road to defeat. Once let our faith languish and decay, and all our graces will languish with it. Courage, patience, long-suffering, and hope, will soon wither and dwindle away. Faith is the root on which they all depend."