According to the author of Hebrews, God’s people at that time never entered into His rest, because they didn’t trust in His promises (Hebrews 3:11).
In the passage about the fig tree, Jesus refers to an unnamed mountain:
“Whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith” (Mark 11:23).Jesus was saying to His disciples, as well as to us today: “Unbelief in your heart is like a hindering mountain that cannot be moved. If it is not cast out, I cannot work with you.”
The fact is, Jesus was unable to perform miracles in a certain town because of the people’s unbelief:
“He did not do many mighty works there because of their unbelief” (Matthew 13:58).The same holds true for Christ’s church today: wherever there is unbelief, He is unable to work. Unbelief is always the mountain that hinders the fullness of God’s revelation and blessing in His children.