Your Unbelief, from Here to There

"And when they had come to the multitude, a man came to Him, kneeling down to Him and saying, 'Lord, have mercy on my son, for he is an epileptic and suffers severely; for he often falls into the fire and often into the water. So I brought him to Your disciples, but they could not cure him.' Then Jesus answered and said, 'O faithless and perverse generation, how long shall I be with you? How long shall I bear with you? Bring him here to Me.' And Jesus rebuked the demon, and it came out of him; and the child was cured that very hour."

"Then the disciples came to Jesus privately and said, 'Why could we not cast it out?' So Jesus said to them, 'Because of your unbelief; for assuredly, I say to you, if you have faith as a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you. However, this kind does not go out except by prayer and fasting." 

(Matthew 17:14-21)

I think we could consider HERE our soul (the mind, will and emotions; where we make our decisions), and THERE the cross (where/how we learn to follow Him).

"For the message of the cross is foolishness to those who are perishing (yet faithless and perverse in their ability), but to us who are being saved it is the power of God. For it is written: 'I will destroy the wisdom of the wise, and bring to nothing the understanding of the prudent.' Where is the wise? Where is the scribe? Where is the disputer of this age? Has God not made foolish the wisdom of this world? For since, in the wisdom of God, the world through wisdom did not know God, it pleased God through the foolishness of the message preached to save those who believe." 

(1 Corinthians 1:18-21)

So then, your faithlessness considers other things as it responds, rendering perverse actions contrary to Christ. We have to learn to follow Him, not the wisdom of the world.