We are all at war with God until we surrender to His will.  His will starts with our salvation.  Peace comes at salvation.

Are you at peace with God?

I create the fruit of the lips; Peace, peace to him that is far off, and to him that is near, saith the LORD; and I will heal him.

But the wicked are like the troubled sea, when it cannot rest, whose waters cast up mire and dirt.

There is no peace, saith my God, to the wicked. 

Isaiah 57:19-21

Who are the wicked?

They that reject God’s righteousness, which is found only in Messiah Jesus, and go about to establish their own righteousness.

Those who justify themselves remain at war with God.

…let the word of Christ dwell in you richly…