Sometimes the wisdom comes though information we collect, sometimes through circumstances, sometimes through another person. It is a good habit to talk things over with a trusted advisor before exercising your freedom of choice. When we maintain a close ongoing relationship with him we are able to seek wisdom from him, and the result is joy and contentment in our lives. Too often, however, we are not obedient to the clear will of God. For example, we have said that sexual sin is not a part of God's general will.
Wisdom is against illicit sexual relationships for a number of reasons on a personal level.
But the reality is, we have been plainly disobedient to Jesus by ignoring his general will and by ignoring the wisdom which cascades from it. We must act on it. God's will may indeed be a mystery at times, but it is not mysterious. We do not need to auger Jesus' plan for our life by selecting some random verse from the Bible and try attaching some sense to it like the Moravians and others in more recent history have tried to do. We can be sure we are following God's will if we have an ongoing personal relationship with Jesus, if we are aware of his general will, and if we properly exercise the freedom we have in Jesus.