There are all sorts of opportunities to doubt God's faithfulness and His sustaining goodness to us. Financial difficulties, marriage or roommate difficulties, church difficulties—everywhere we look in life we can see reasons the world would give us for not trusting God in the midst of difficult circumstances or fearful endeavors.
In my life right now it seems in every direction there are opportunities for the enemy to whisper or shout, "You will not have peace!" Our home bears the weight of that threat, my relationships bear the weight of it, my mind bears the weight of it, even my heart bears it. It has been a hard year. I'm not complaining, I'm just confessing that I look around me right now and say with Job, "I am not at ease, nor am I quiet; I have no rest, but trouble comes (Job 3:26)."
When I feel the lack of peace I tend to go hunting for it. I'll turn over every rock and stone until I find it, but Isaiah 26:3 says that it is GOD who keeps me in peace. In all my grappling and grasping for it, He's the keeper of it. All I do is keep my eyes fixed on Him, the author and finisher of my faith (Heb. 12:2).
Choosing today to fix my eyes on Him, not my circumstances or fears. Trusting today that He'll keep me in perfect peace, like a good father keeps his children in clothing and food, keeps his home in order—this is the way God keeps me clothed and sustained in peace.