Down beneath the surface that is agitated by storms, and driven about with winds, there is a part of the sea that is never stirred. When we dredge the bottom and bring up the remains of animal and vegetable life we find that they give evidence of not having been disturbed in the least, for hundreds and thousands of years.
Years ago a submarine was being tested and had to remain submerged for many hours. When it returned to the harbor, the captain was asked, "How did the terrible storm last night affect you?" The officer looked at him in surprise and exclaimed, "Storm? We didn't even know there was one!" The sub had been so far beneath the surface that it had reached the area known to sailors as "the cushion of the sea."
The peace of God is that eternal calm which, like the cushion of the sea, lies far too deep down to be reached by any external trouble and disturbance; and he who enters into the presence of God, becomes partaker of that undisturbed and undisturbable calm.
"And the peace of God, which surpasses all understanding, will guard your hearts and your thoughts in Christ Jesus." (Phil. 4:7)