“May you never bear fruit again.” (Matt 21:19)
To “believe” in God is to recognize God’s position as the Owner of everything and as the Supreme Enjoyer of everything. It is recognizing God as our Creator, and Protector. Having “faith” is trusting that everything that happens, happens by the sanction of God. "Faith" is also non-different from 'trust.' In other words, "faith" is trusting in God
If they have any doubt, there is no relationship. Therefore, a person who trusts God and has no doubts in His abilities will not be asking God to throw a mountain into the sea just to see if it will happen. Furthermore, they will not be asking for frivolous things or things for their own enjoyment. Why? Because this consciousness of having faith in God and trusting in God without doubt is inseparable from the consciousness of being God's humble servant.
(For a translation of Jesus' statements from the Book of Matthew without institutional sectarian influence, see the Gospels of Jesus - translated from the original Greek texts.)