Matthew 21:18 says, Now in the morning as he returned into the city, he hungered.  The next day, Jesus returned to Jerusalem, this time without all the crowds preparing the way.  We are told that Jesus was hungry.  We either have to accept that Jesus was just as human and subject to all the physical needs and temptations as anyone who has ever lived, or we have to deny that He is the Messiah.  If Jesus only kept from sinning because He was unable to sin, then we have a false salvation.  Jesus had to fulfill the law through faith in and obedience to the heavenly Father, not because He was incapable of temptation.  Verse nineteen states, And when he saw a fig tree in the way, he came to it, and found nothing thereon, but leaves only, and said unto it, Let no fruit grow on thee henceforward for ever. And presently the fig tree withered away.   Being hungry, Jesus went to a fig tree and found it barren.  He then declared that no fruit should grow on it again, and the fig tree withered and died.  I don't believe that Jesus did this out of anger.  The purpose of the fig tree was to bear figs, and the tree was not living up to its purpose.  A fig tree that doesn't bear figs is useless.  I believe that Jesus was using this opportunity to teach the disciples about bearing fruit.  Their purpose, and ours as followers of Christ, is to bear spiritual fruit for Him.  If we do not, then spiritually we will wither and die.  This does not mean that we are suddenly unsaved, but that we are spiritually unproductive, or barren.  If someone comes to us spiritually hungry, we must be ready to feed them with the gospel.  Verse twenty says, And when the disciples saw it, they marvelled, saying, How soon is the fig tree withered away!  The disciples marveled at how quickly the fig tree withered away.  If we are not fulfilling Christ purpose for us today, our usefulness in His kingdom may just as quickly fade away.  Verse twenty-one says, Jesus answered and said unto them, Verily I say unto you, If ye have faith, and doubt not, ye shall not only do this which is done to the fig tree, but also if ye shall say unto this mountain, Be thou removed, and be thou cast into the sea; it shall be done.  Once more Jesus told the disciples about the power of faith, and that power did not end with the disciples, but is still there for us today.  This type faith, to wither a fig tree or move a mountain as Jesus told the disciples they could do, comes with a big"if."  Jesus told the disciples if they had faith and doubted not that they could move mountains.  I also believe that this type faith will never ask for anything that does not glorify God.  Even with the greatest of faith, if we are acting to bring honor or riches to ourselves, I do not believe that God will honor our faith.  Even if we somehow are successful and receive the honor and riches of the world for ourselves, we will not have been successful through the blessing of God.  This is not a name what I want and claim it promise.  This is a promise that with an unwavering faith that we can accomplish anything that God calls us to do, so that He might be glorified.  Verse twenty-two states, And all things, whatsoever ye shall ask in prayer, believing, ye shall receive.  As just stated, this has to be in accordance with God's will and to glorify Him.  True prayer seeks God's will and not our own desires, as was demonstrated by Jesus' prayer in the garden.  I don't believe that we can ever make this about God giving us everything we want simply because we have faith that He will.  Not everything that we want brings glory to God.