Think on these things: and the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus

Philippians 4:

4 Rejoice in the Lord alway: and again I say, Rejoice. 

5 Let your moderation be known unto all men. The Lord is at hand. 

6 Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God. 

7 And the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus. 

8 Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things. 

9 Those things, which ye have both learned, and received, and heard, and seen in me, do: and the God of peace shall be with you.