Romans 12:2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.

Philippians 1:10 That ye may approve things that are excellent; that ye may be sincere and without offence till the day of Christ;

1 Thessalonians 5:21 Prove all things; hold fast that which is good.