Proverbs 4:23 NIV

"Above all else, guard your heart, for everything you do flows from it."

Proverbs 4:23 EEB

Be very careful to keep your mind safe. The thoughts that you think make you the person that you are.

Romans 12:2 NLT

Don’t copy the behavior and customs of this world, but let God transform you into a new person by changing the way you think.

Philippians 4:8-9 NLT

And now, dear brothers and sisters, one final thing. Fix your thoughts on what is true, and honorable, and right, and pure, and lovely, and admirable. Think about things that are excellent and worthy of praise... Then the God of peace will be with you.

Isaiah 26:3 NLT

You will keep in perfect peace all who trust in you, all whose thoughts are fixed on you!