Romans 12:2 
Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is--his good, pleasing and perfect will.

Ephesians 4:23 
to be made new in the attitude of your minds;


Philippians 4
4  Rejoice in the Lord always. I will say it again: Rejoice! 
5  Let your gentleness be evident to all. The Lord is near. 
6  Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God. 
7  And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus.
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8  Finally, brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things. 
9  Whatever you have learned or received or heard from me, or seen in me—put it into practice. And the God of peace will be with you.

Heart
Proverbs 23:7a  For as he thinks in his heart, so is he. NKJV
Proverbs 17:22 A cheerful heart is good medicine, but a crushed spirit dries up the bones.
Proverbs 15:13 A happy heart makes the face cheerful, but heartache crushes the spirit.
Matthew 5:8 Blessed are the pure in heart, for they will see God.
Psalm 73:1 A psalm of Asaph. Surely God is good to Israel, to those who are pure in heart.
Psalm 51:10 Create in me a pure heart, O God, and renew a steadfast spirit within me.
Ezekiel 36:26 I will give you a new heart and put a new spirit in you; I will remove from you your heart of stone and give you a heart of flesh.

Spirit
Proverbs 18:14 A man's spirit sustains him in sickness, but a crushed spirit who can bear?

Words
Proverbs 12:25 An anxious heart weighs a man down, but a kind word cheers him up.
Proverbs 13:3 He who guards his lips guards his life, but he who speaks rashly will come to ruin.
Proverbs 18:21 The tongue has the power of life and death, and those who love it will eat its fruit.

Stand FIRM
2 Samuel 22:27 to the pure you show yourself pure, but to the crooked you show yourself shrewd.
Psalm 18
25To the faithful you show yourself faithful, to the blameless you show yourself blameless,
26to the pure you show yourself pure, but to the crooked you show yourself shrewd.
27You save the humble but bring low those whose eyes are haughty.
Isaiah 2:11 The eyes of the arrogant man will be humbled and the pride of men brought low; the LORD alone will be exalted in that day.