We lose our peace when we give in to stress and troubles which can be work-related, family-related or even personal struggles. We think that our enemy is human though the root of it is that we wrestle not against flesh and blood but against all the principalities (spiritual forces) of darkness.
The solution is found in the word of the Lord to us in Ephesians 6 to take up our full armour especially the shield of faith (literally translated as THE LARGE SHIELD OF BELIEF). This mighty and large shield is able to quench (extinguish) all the fiery darts (flaming arrows) that is aimed to harm us. Let us raise up this invincible shield so that we are covered.
Wear our helmets as well as it protects our minds from all the negative and destructive thoughts that come from the wicked one. Put on the belt of truth, the breastplate of righteousness and the shoes of the gospel of peace.
Then let us take up the Sword of the Spirit which is the word (literally translated as declaration i.e. rhema) of God on our lips testifying (speaking forth) against and defeating our enemy.
As in Rev 12:11, we overcome (literally conquer) our accuser through the Blood of Jesus (the Lamb) and the word of our testimony (literally, through the saying of our witness). We are already under the Blood because we trust in Jesus so we declare out loud to our accuser that we have victory, we have joy, we have freedom and we will walk in the Lord's plan for our lives.
Finally in persevering (holding on) prayer and petition in the spirit (with our spiritual language) for the Lord's help and deliverance in and through all our trials, we have victory and peace! Come on, be strong and courageous and let's fight on - we are on the winning side!