my soul as much as I can; and while I am so with Him I fear nothing; but the least turning from Him is insupportable. (-Br. Lawrence)
Rejoice in the Lord always; again I will say, Rejoice. Let your reasonableness be known to everyone. The Lord is at hand; do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus. (-Apostle Paul; Philippians 4:4-7)
I can't help but think that that these passages are closely linked. I once heard a pastor talking about the "peace that surpasses understanding" in this way (and I paraphrase): Have you ever thought about the ocean in a storm? On the surface, things may be going crazy: waves crashing, swells, rain, winds, lightening, thunder. It can be a really scary place. But, if you go just a couple hundred feet below the surface, things are completely different. The water below the surface is relatively unaffected by the storm. Just a little ways down, there is peace and calm and stillness.