Matthew 21:21

Verse 21. Jesus answered and said, etc. Jesus took occasion from this to establish their faith in God, Mr 11:22. He told them that any difficulty could be removed by faith. To remove a mountain, denotes the power of overcoming any difficulty. The phrase was so used by the Jews. There is no doubt that this was literally true, that if they had the faith of miracles, they could remove the mountain before them the mount of Olives--for this was as easy for God to do by them as to heal the sick, or raise the dead. But he rather referred, probably, to the difficulties and trials which they would be called to endure in preaching the gospel.