Luke 8:50 But when Jesus heard it, He answered him, saying, “Do not be afraid; only believe, and she will be made well.”
How many times have you been let down by someone who has promised you things but never delivered on the promise? How does that make you feel?
It is hard to believe stuff if you have lived most of your life with people not carrying out promises or going against the rules.
Jesus upheld the law and He upheld every word He spoke. When He told the temple ruler to believe it was not “trust me I’m a doctor” but “trust me I’m God!”