How does perfect love cast out fear? (1 John 4.18)

Question 207, from John, United Kingdom

What does it mean that “perfect love casts out fear”? How does it cast it out?

This phrase is found in the first letter of John, 1 John chapter 4, verse 18: “There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love.” (more…)