"You will keep Him in perfect peace, whose mind is stayed on You, because he trusts in You (Isaiah 26:3). Once we have peace in our hearts and minds, we are acknowledging that God would care for us. Believers in Jesus can have peace in the midst of uncertainties because we have the assurance that our Heavenly Father loves His children and cares for our needs (Matt. 6:25-34). We can bring all our concerns to Him with an attitude of thankfulness, trusting Him to meet our needs and gives us peace.
"The peace of God, which surpasses all understanding", writes the Apostle Paul, "will guard your hearts and minds through Christ Jesus (Phil 4.7)". To say the peace of God surpasses all understanding reveals that we can't explain it, but we can experience it as He guards our hearts and minds. Our peace comes from the confidence that the Lord loves us and He is in control. He alone provides the comfort that settles our nerves, fills our minds with hope, and allows us to relax even in the midst of changes and challenges.