Romans 12:2 KJV
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.
Romans 3:4 KJV
4 God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.
1 Thessalonians 5:21 KJV
21 Prove all things; hold fast that which is good.