Do not act like the sinful people of the world. Let God change your life. First of all, let Him give you a new mind. Then you will know what God wants you to do. And the things you do will be good and pleasing and perfect.
Romans 12:2 (NLV)

But the Helper, The Holy Spirit, whom The Father will send in My Name, He will teach you all things and bring to your remembrance all that I have said to you.
John 14:26 (ESV)

For who has know the Mind and Purposes of The Lord, so as to instruct Him? But we have the Mind of Christ, (to be guided by His Thoughts and Purposes).
I Corinthians 2:16 (AMP)