Fear is a part of human nature; we learn to fear things that cause us pain or lead to bad situations. Take these things into consideration: a snarling Rottweiler standing in front of you, a hive of buzzing bees, your boss telling you to come to the office, or a deep lake (if you can’t swim). These things are examples of things we learn to fear. A Rottweiler can bite you, a bee can sting you, a boss can reprimand you, and a lake can drown you.
So, then. What is this thing called courage? I will tell you first what courage is not: courage isn’t the absence of fear. Instead, courage is the act of continuing through a situation even when you are afraid.
Look at the order of words in today’s scripture: strong -> good courage -> fear not -> nor be afraid. God is telling us that when we are faced with adversity, remember to be strong and have courage, even when we are afraid. Once we begin to act in courage, what we were afraid of will no longer seem so fearful; therefore, “we will fear not, nor be afraid of them.”
Why will we not be afraid? Because we realize, then, that God, who is always with us, telling us the best ways to live, is stronger than our fear. He tells us in this passage to have strength and courage, which are attributes that our Lord God display in His own character in Jesus Christ.
Since a Christian is a “little Christ,” meaning a follower of Jesus, we, too, are meant to stand in the face of adversity as Lord Jesus did: with strength against opposition (Matt. 4:1-11), courage in the face of danger (Mark 4:35-41), and faith in the Father (Luke 22:42). Through these three things, we can overcome our fears in life with the Holy Spirit by our side.