what does the bible say?
The Bible indicates that we can overcome fear by leaning on God to get us through. Psalm 23 is an example of that. The Old Testament recounts David's many trials, from running for his life (from Saul and from David's own son) to the death of a child to the kingdom almost being taken from him and more. While Psalm 23 doesn't tell us when David wrote it, it shows David's reliance on God through trials. The reason David didn't fear evil is found in the very words within Psalm 23:4: He knew God was with him.
The Bible contains many examples that teach the importance of relying on God through fearful circumstances. When Nehemiah set out to rebuild Jerusalem's walls, he faced strong opposition but conquered his fear by his confidence that God would give him success (Nehemiah 2:20, 4:14), and He did. King Asa was punished for allowing his fear to overcome him so that he sought help from a foreign power rather than on God (2 Chronicles 16:1–10).
In the New Testament, Jesus tells us to expect suffering in life and to abide in Him
(John 16:33, 15:4-5), which shows how to overcome the fear of suffering. Paul experienced much pain—some of it that would easily lead to death—yet he repeatedly relied on God's strength to get through it (2 Corinthians 1:5, 1:8-10; Philippians 4:13). Evil is part of this broken world, but Scripture teaches us that our trust and confidence in God can overcome any fear of evil.