He is always willing to make His purpose known, but He will not show you His will if you are merely considering doing it. Don't expect God to shout. Quiet is essential to effective listening. You can't jam your mind with carnal influences 12 hours a day and expect God to reveal His plans to you during a commercial. If you are passively or openly rebelling against God in some area of your life, you are putting a plug in the pipeline God uses to deliver His messages.
Unconfessed sin is a major plug.
God gave us common sense and He expects us to use it. Most of the time, His will makes sense to our reason and intelligence, but not always. Sometimes His direction cuts across all human reason, and even goes totally contrary to it. When the inner voice of God speaks clearly, obedience may be counted as madness in the eyes of the world. But if you are willing to be God's fool, then you will see His power.