Proverbs 20:27 (NKJV)
Sometimes in the Winter you have to scrape ice or snow, or both, off of your car windows before you can start driving. It could be that you are leaving for work in the morning and you are in a hurry so you just clean as much as you think is necessary before you start to drive. But if you don't scrape off all of the ice or snow you can't really see clearly and you could have an accident. You may think that just cleaning your windows a little bit is enough, but you are really just starting your journey without a clear view of everything you should see and that is never a good thing to do.
Proverbs 20:27 tells us that our spirit, the inner man, is where God will give us light. Our spirit is compared to a lamp and in Psalm 18:28 it says that God will light our lamp and enlighten our darkness. This is showing us that God is not going to lead us with external or physical things but inwardly. We may have an idea about a ministry or business we want to start or we have a sense in our heart about a change in our life or our geographic location. But trouble can develop if we start moving forward with only the general idea about these things without having a complete understanding of how to accomplish them.
God wants us to know and understand His will, but there is also a way He wants us to carry it out and there is a right time to do it. As Paul wrote in Colossians 1:9, we need to be filled with the knowledge of God's will along with having wisdom and spiritual understanding. God will reveal His will to us through His Word and by the Holy Spirit so that we have knowledge of His plans and purposes for us. This usually comes to us step by step and as we take the steps He gives us things will become clearer and clearer. Make sure you get the whole plan from God to see things clearly to be able to successfully fulfill the will of God.