To understand this verse we need to take a look at the word “evil" (harm NASB) (205). The most common translation of this in both the NASB and KJV is “iniquity.” That should give a better insight into what is going on. This might well be a promise that those who are walking in righteousness do not need to fear the destructive power of sin. Think of this promise:
(1 John 4:4 KJV) Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.When we walk upright lives the power of God shields us from overwhelming evil, empowers us to resist and overcome and helps us shed sin like water off a duck. Does it mean that we will never have a flat tire? No. It means that God will pick the timing and give us the equipment to change it. My favorite equipment is the AAA guy.
So? We do not need to live in fear but notice the qualifier: Being righteous. That is the work of the Holy Spirit and God’s grace with a willing heart. It kind of reverses the sports mantra to “No foul, no harm.”