Mark 9 :14-29
14 When they came to the other disciples, they saw a large crowd around them and the teachers of the law arguing with them.
15 As soon as all the people saw Jesus, they were overwhelmed with wonder and ran to greet him.
16 "What are you arguing with them about?" he asked.
17 A man in the crowd answered, "Teacher, I brought you my son, who is possessed by a spirit that has robbed him of speech.
18 Whenever it seizes him, it throws him to the ground. He foams at the mouth, gnashes his teeth and becomes rigid. I asked your disciples to drive out the spirit, but they could not."
19 "O unbelieving generation," Jesus replied, "how long shall I stay with you? How long shall I put up with you? Bring the boy to me."
20 So they brought him. When the spirit saw Jesus, it immediately threw the boy into a convulsion. He fell to the ground and rolled around, foaming at the mouth.
21 Jesus asked the boy's father, "How long has he been like this?" "From childhood," he answered.
22 "It has often thrown him into fire or water to kill him. But if you can do anything, take pity on us and help us."
23 "'If you can'?" said Jesus. "Everything is possible for him who believes."
24 Immediately the boy's father exclaimed, "I do believe; help me overcome my unbelief!"
25 When Jesus saw that a crowd was running to the scene, he rebuked the evil spirit. "You deaf and mute spirit," he said, "I command you, come out of him and never enter him again."
26 The spirit shrieked, convulsed him violently and came out. The boy looked so much like a corpse that many said, "He's dead."
27 But Jesus took him by the hand and lifted him to his feet, and he stood up.
28 After Jesus had gone indoors, his disciples asked him privately, "Why couldn't we drive it out?"
29 He replied, "This kind can come out only by prayer."

The boy was affected by an evil spirit. When we hear the words like demon, Satan, evil spirit, we may be thinking of a creature with tail and horns. But we can perceive the evil thoughts and temptations coming to our mind as demons. Jesus rebukes the disciples as "you of little faith. How long shall I put with you unbelieving people'. Faith can change anything. According to your faith, it will be done to you. The boy's father was aware of his lack of faith and he prays "Help me to overcome my un-belief".

We can also struggle with lack of faith at times. Once we identify our lack of faith and make a decision to repent and pray, we can really change. Whatever be our sin or weakness, once we see that and admit that and pray sincerely for God's help, we can overcome them. Let us examine as to which are the demons, that control us. Selfishness, laziness, pride, lust, greed, hatred, jealousy? If we really want to change, then we have to come out of our comfort zone. In Mark 10, the blind man was not idly sitting there and begging. But, once he knew that Jesus was coming, he shouted loudly, pleading for help. Though people rebuked him, he kept on pleading till he got help. Let us expect Mighty Miracles to happen in our life. We should expect God to use us more than ever before. Do you believe that?

What is our purpose of life? God created us and he has a purpose for our life. If we can identify with God's purpose for our life, then our life is meaningful.