Those who consider themselves religious and yet do not keep a tight rein on their tongues deceive themselves, and their religion is worthless.
James 1:26 New International Version (NIV)
Religion that God our Father accepts as pure and faultless is this: to look after orphans and widows in their distress and to keep oneself from being polluted by the world.
James 1:27 (NIV)
As obedient children, do not conform to the evil desires you had when you lived in ignorance. But just as he who called you is holy, so be holy in all you do; for it is written: “Be holy, because I am holy.”
1 Peter 1:14-16 (NIV)
God is holy: Father, Son, and Holy Spirit.
Be holy, because God is holy