Guard your heart with all diligence

( of flickr)

Related Scripture:
Proverbs 4:23
Keep your heart with all vigilance,
for from it flow the springs of life.

"Guard your heart with all diligence" is how I remember it in my head, but it could be a mix-up of multiple versions since I can't find a version that has that exact phrase. Quoting verses I learned as a child is difficult because I learned in both the old NIV (which apparently they changed?) and the NKJV. The ESV is what I have quoted here. For future reference, I now study mainly from the ESV and the NET.

Philippians 4:4-7
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.