If we understood that Jesus already fought the battle for us we will avoid uneccessary worry, anxiety, depression, and panic on situations that will only make us stronger in the long run. What Jesus did for us on the cross of calvary should instill in us a sense of security and everlasting peace. John 16:33 ""I have said these things to you that in me you may have peace. In the world you will have tribulation. But take heart; I have overcome the world."" (ESV)