“Jesus said unto him, If thou canst believe, all things are possible to him that believeth.”
Mark 9:23 — Greek Interlinear
Church Fathers on Mark 9:23
After He had shewn His glory in the mount to the three disciples, He returns to the other disciples, who had not come up with Him into the mount; wherefore it is said, 'And when He came to His disciples, He saw a great multitude about them, and the Scribes questioning with them.'
But there is no peace for man under the sun; envy is ever slaying the little ones, and lightnings strike the tops of the great mountains. Of all those who run to the Church, some as the multitudes come in faith to learn, others, as the Scribes, with envy and pride.
In all cases, the difference between the mind of the Scribes and of the people ought to be observed; for the Scribes are never said to have shewn any devotion, faith, humility, and reverence, but as soon as the Lord was come, the whole multitude was greatly amazed and feared, and ran up to Him, and saluted Him; wherefore there follows, 'And running to Him, saluted Him.'