Greek
4102. pistis -- faith, faithfulness ... self-control; against such things there is no
law.".
... your mind, so that you may prove
what (2307) of
God is, that which is good and acceptable and
perfect.
... /greek/4102.htm - 18kTorrey's TopicalTextbook
Psalm 19:7The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.
Torrey's Topical Textbook—AKJVRomans 12:2
And be not conformed to this world: but be you transformed by the renewing of your mind, that you may prove what is that good, and acceptable, and perfect, will of God.
Torrey's Topical Textbook—AKJV