As with everything worth conquering, fear is a worthy adversary. Fear can be rational like when you fear for your life when driving in a snow storm and your car makes a 180 degrees turn, so you are facing oncoming traffic with just as little traction as you.
Or fear can be irrational, totally disproportionate to age, experience, or actual conditions. Irrational fear is more crippling. It keeps one from starting or finishing, from forgiving or leaving, from loving or risking, from living or dying (to self).
Joshua gives great encouragement, “Have I not commanded you? Be strong and of good courage; do not be afraid, nor be dismayed, for the LORD your God is with you wherever you go.”
Whew . . . the LORD your God is with you wherever you go?!! Problem solved. Fear banished . . . for now.