17 And one of the multitude answered and said, Master, I have brought unto thee my son, which hath a dumb spirit;
18 And wheresoever he taketh him, he teareth him: and he foameth, and gnasheth with his teeth, and pineth away: and I spake to thy disciples that they should cast him out; and they could not.
19 He answereth him, and saith, O faithless generation, how long shall I be with you? how long shall I suffer you? bring him unto me.
20 And they brought him unto him: and when he saw him, straightway the spirit tare him; and he fell on the ground, and wallowed foaming.
21 And he asked his father, How long is it ago since this came unto him? And he said, Of a child.
22 And ofttimes it hath cast him into the fire, and into the waters, to destroy him: but if thou canst do any thing, have compassion on us, and help us.
23 Jesus said unto him, If thou canst believe, all things are possible to him that believeth.
24 And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
25 When Jesus saw that the people came running together, he rebuked the foul spirit, saying unto him, Thou dumb and deaf spirit, I charge thee, come out of him, and enter no more into him.
26 And the spirit cried, and rent him sore, and came out of him: and he was as one dead; insomuch that many said, He is dead.
27 But Jesus took him by the hand, and lifted him up; and he arose.
28 And when he was come into the house, his disciples asked him privately, Why could not we cast him out?
29 And he said unto them, This kind can come forth by nothing, but by prayer and fasting.
30 And they departed thence, and passed through Galilee; and he would not that any man should know it.
31 For he taught his disciples, and said unto them, The Son of man is delivered into the hands of men, and they shall kill him; and after that he is killed, he shall rise the third day.
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The ancient Christians, when compiling the order of church readings, most likely assigned today's passage from the Gospel of Mark to this Sunday of Great Lent because of Christ's words: "This kind is driven out only by prayer and fasting". From these words of the Savior the conclusion suggests itself that prayer and fasting are not merely important, but at times irreplaceable means of a person's spiritual life. At the same time, of course, it must be kept in mind that the word "fasting" (as in the analogous phrase in the Gospel of Matthew) is a comparatively late Byzantine insertion here, and in the original the evangelist Mark most probably wrote, "this kind cannot come out by anything except prayer."
Nevertheless, the question of why one cannot make do in spiritual life with something more convenient seems quite natural at first glance. Yet Christ's words set every accent precisely, for without prayer you can engage in moral self-improvement or charity, but that will hardly be spiritual life.
But in the evangelist Mark's account there are words that may be no less important for us in our relationship with God. These are the words of the father of the possessed boy: "I believe, Lord; help my unbelief." None of us would dare say that he believes "wholly and completely." The constant movement from trust toward confidence and hope by accumulating the experience of faith is a natural and, I dare say, necessary part of spiritual life. And in this it is very important for us to know that we can choose not to hide unbelief, shamefully pretending to be some hypothetical confident person. This man's example says that we can bring our weakness in faith to Christ and find help and strengthening in Him Himself.