It is indeed a virtue to desire to know what God wants you to do. He has a secret plan for your life that is absolutely none of your business, but He may lead you and direct your paths. So there is nothing wrong with seeking the illumination of the Holy Spirit, or the leading of God, in our lives, and that is usually what people are concerned with when they ask about God’s will. However, we tend to have an ungodly desire to know the future. We want to know the end from the beginning, which is indeed none of our business. It is God’s business, which is why He is so severe in His warnings in Scripture against those who try to find out the future through illicit means such as Ouija boards, fortune tellers, and tarot cards. Those things are off-limits for Christians. . . .
We are encouraged by Scripture to learn the will of God for our lives, and we do so by focusing our attention not on the decretive will of God but on the preceptive will of God. If you want to know God’s will for your life, the Bible tells you: “This is the will of God, your sanctification” (1 Thess. 4:3). So when people wonder whether to take a job in Cleveland or in San Francisco, or whether to marry Jane or Martha, they should study closely the preceptive will of God. They should study the law of God to learn the principles by which they are to live their lives from day to day. . . .
you cannot be outside the decretive will of God. Second, the only way you are going to know the hidden will of God for you today is to wait until tomorrow, and tomorrow will make it clear to you because you can look back on the past and know that whatever happened in the past is the outworking of the hidden will of God. In other words, we only know God’s hidden will after the fact. We usually want to know the will of God in terms of the future, whereas the emphasis in Scripture is on the will of God for us in the present, and that has to do with His commands. 
1. R.C. Sproul, Everyone's a Theologian: An Introduction to Systematic Theology (Reformation Trust, 2014), p. 73.
3. Ibid., p. 74.