He will cover you with His pinions, And under His wings you may seek refuge; His faithfulness is a shield and bulwark. Psalm 91:4 Faith is fear transformed by the act of our own will, calling to mind mighty God, and betaking ourselves thereto. Alexander Maclaren, 1826-1910, British Baptist expository preacher

You will not be afraid of the terror by night, Or of the arrow that flies by day. Psalm 91:5

God does not take away from us those natural fears which lead us to seek the preservation of life, but He masters them by a serene security of heart produced by His Presence. Charles Haddon Spurgeon, 1834-92

He who dwells in the shelter of the Most High will not be afraid of the pestilence that stalks in darkness, Or of the destruction that lays waste at noon. Psalm 91:1a,5a,6
When I put the sovereignty of God beside His unfailing love, my heart can rest. Verdell Davis, Christian author

He will give His angels charge concerning you, To guard you in all your ways. Psalm 91:11
Guardian angels have received commission of charge from their Lord and ours to watch carefully over all the interests of the faithful. It is the angels’ charge to oppose us, as to preserve us in the way. Thomas Adams, 1583–1653, English Puritan Calvinist preacher

His angels will bear you up in their hands, That you do not strike your foot against a stone. Psalm 91:12 God preserves us from many dangers which are very threatening, and very near, and yet we ourselves are not apprehensive of them. Joseph Benson, 1749–1821, English Methodist minister, contemporary of John Wesley