How God's will is used in Scripture
Here is how we see God's will being spoken of in Scripture.
God's decretive will - This is always accomplished.
Job 23:13, "But He is unique and who can turn Him? And what His soul desires, that He does."
Psalm 33:11, "The counsel of the Lord stands forever. The plans of His heart from generation to generation."
Isaiah 14:24, "The Lord of hosts has sworn saying, 'Surely, just as I have intended so it has happened, and just as I have planned so it will stand.'"
Isaiah 46:10, "Declaring the end from the beginning and from ancient times things which have not been done, 'Saying, ‘My purpose will be established, and I will accomplish all My good pleasure’".
Acts 17:24, "The God who made the world and all things in it, since He is Lord of heaven and earth, does not dwell in temples made with hands."
God's preceptive will - This is not always accomplished.
Rom. 12:2, "And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what the will of God is, that which is good and acceptable and perfect."
Eph. 6:6, "not by way of eyeservice, as men-pleasers, but as slaves of Christ, doing the will of God from the heart.".
1 Thess. 4:3-6, "For this is the will of God, your sanctification; that is, that you abstain from sexual immorality; 4 that each of you know how to possess his own vessel in sanctification and honor, 5 not in lustful passion, like the Gentiles who do not know God; 6 and that no man transgress and defraud his brother in the matter because the Lord is the avenger in all these things, just as we also told you before and solemnly warned you."
God in his sovereignty has allowed for men to disobey him. Nothing is down outside of His sovereignty. But God has allowed his preceptive will(What God's laws) to not always happen. So when we see passages like I Thess 4 where we know that there is sexual immorality happening all the time, we see God's will not being done. But "will" here is being used a little bit different from "will" when we speak of his decrees.