Matthew 17:14 says, And when they were come to the multitude, there came to him a certain man, kneeling down to him, and saying,  Jesus and His disciples were once again among the multitudes.  After we spend time alone with God, we must once more go out to the multitudes.  God never calls us to isolate ourselves from the world, but calls us to go to the multitudes.  I believe that too often, we as followers of Christ, withdraw from the world in fear, instead of reaching out to the lost people in the world empowered by God.  The world can indeed be a scary place, but our God is greater than any world power.  A certain man came to Jesus with a particular need.  If we have concerns today, we must bring them to Jesus.  Verse fifteen states, Lord, have mercy on my son: for he is lunatick, and sore vexed: for ofttimes he falleth into the fire, and oft into the water.  The man made his concern, which was about his son, known to Jesus.  The man's son was a lunatic, according to the man.  The son was often injuring himself, either falling into the fire or the water.  We should always bring our concerns, especially about our children, to God.  No matter how bad off we may think they are, through Christ there is always hope.  Verse sixteen says, And I brought him to thy disciples, and they could not cure him.  The man said he had already brought his son to the disciples and they could not cure him.  Although we do not have the power to heal the lost of the world by our own ability, we do know that Jesus said that through faith in Him we could do everything that He did on earth, except be the Savior of the world.  Verse seventeen states, Then Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I suffer you? bring him hither to me.  Jesus was not speaking about the man who came to Him, but about the those who were following Him, and I believe the disciples in particular.  Jesus said that they were a faithless and perverse generation.  What would Jesus call us today, who profess to follow Him, but often cower in fear, afraid of what the world may do to us if we boldly profess Christ.  We need to realize that through the power of the Holy Spirit that we never need to be afraid of anyone, or anything, in this world.  When we are, it shows a lack of faith on our part.  Even though Jesus was not to physically be with them much longer, though our faith in Him, He is with us forever, through the Holy Spirit indwelling us.  We must not doubt that God will give us the ability to accomplish anything He calls us to do.  Verse eighteen states, And Jesus rebuked the devil; and he departed out of him: and the child was cured from that very hour.  We never find a case where the Devil had any power over Jesus, just as the Devil has no power over us if we are living under the power of the Holy Spirit.  Jesus rebuked the devil, the devil departed, and the child was cured that very hour.  Verse nineteen says, Then came the disciples to Jesus apart, and said, Why could not we cast him out?  The disciples wanted to know why they failed.  We today may sometimes wonder why we aren't able to do great things for Christ.  It is best to go to God for the answer.  Verse twenty declares, And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.  Jesus told the disciples that it was because of their unbelief.  They did not really have faith in Jesus to empower them to cast out this devil. Jesus said that with even a mustard seed amount of faith that they could move mountains.  I believe that this would not be simply to show of their faith, but would be to bring glory to God and accomplish His purpose.  Just like the disciples, if we struggle in doing what we know God wants us to do, it is because our faith is too small.  Verse twenty-one says, Howbeit this kind goeth not out but by prayer and fasting.  Jesus tells us that this mountain moving faith only comes from prayer and fasting, which help us focus on the will of God.