1 Peter 3:10-11 and 1 Peter 3:4.
This is what they say (lighting isn't great in the above pics):
"Let him who means to love life and see good days refrain his tongue from evil and his lips from speaking guile. And let him turn away from evil and do good; let him seek peace and pursue it." 1 Peter 3:10-11
"but let it be the hidden person of the heart, with the imperishable quality of a gentle and quiet spirit which is precious in the sight of God." 1 Peter 3:4
If we all took these to heart and asked God to help us live them out, how much more like heaven this world would be.