Frances Havergal wrote several hymns including Take My Life and Let It Be. She also authored many books. In her little devotional, Royal Commandments; or, Morning Thoughts for the King’s Servants, she spent some time focusing on the issue of fear. Hopefully, you’ll find it beneficial.
“Would our King tell us again and again, ‘Fear not!’ if there were any reason at all to fear?
Would He say this kind word again and again … only to mock us, if He knew all the time that we could not possibly help fearing?
Only give half an hour to seeking out the reasons He gives why we are not to fear, and the all-inclusive circumstances in which He says we are not to fear; see how we are to fear nothing, and no one, and never, and nowhere; see how He Himself is in every case the foundation and the grand reason of His command, His presence and His power always behind it and then shall we hesitate to say, ‘I will fear no evil for Thou art with me’? Shall we even fancy there is any answer to those grand and forever unanswered questions, ‘The Lord is my light and salvation; whom shall I fear? The Lord is the strength of my life; of whom shall I be afraid?’
There is a ‘fear not’ for every possible case and kind of fear; so that we have never any answer to give when He asks, ‘Why are you fearful?’ but we are ‘without excuse.’
It is part of His holy covenant that we should serve Him without fear. It is one of His precious promises that ‘thou shalt be steadfast, and shalt not fear.’ It is one of the blessed results of His reign that His flock shall fear no more.’
It is no impossible thing, but the simple natural consequence of really seeking and really trusting the Lord, that He will deliver us not from some, but from all our fears. He did this for David, will He be less kind to you and me?”
~Frances Ridley Havergal (1836-1879)
[F]ear not for I am with you; be not dismayed for I am your God; I will strengthen you, I will help you, I will uphold you with my righteous right hand.
~ Isaiah 41:10 (ESV)