Why are these words from Jesus "Don't be afraid; just believe" (NIV) so important when we need something seemingly impossible from Jesus?

 https://www.youtube.com/shorts/1ni1xtzGvT0?t=20&feature=share

 

Question: Why are these words from Jesus "Don't be afraid; just believe" (NIV) so important when we need something seemingly impossible from Jesus?

See Answer: http://ebible.com/answers/42743?ori=664697