It is also worth noting Gideon’s extreme hesitation, doubt, and fear. The Lord had already told him what to do through the Angel of the Lord (Judges 6:11–16). In fact, the Angel had already given Gideon a confirming sign (Judges 6:17–22).
Is there a more reliable way? Yes, God has clearly and objectively told us what He wants throughout the Bible. For example, the Ten Commandments give straightforward instructions to guide our behavior in numerous areas of life. Likewise, one of the New Testament letters to the Thessalonians says plainly, “This is the will of God” (1 Thess. 4:3). Thus when it comes to making choices in life, God calls us to clear thinking—thinking that is based on our relationship with Him and our allegiance to His values, which are clearly spelled out in Scripture.
God has made us to be thinking, discerning, analytical persons who assume responsibility for working our way through life in accordance with His general plans and purposes. He challenges us to learn all that we can about any situation, relationship, responsibility, or opportunity that we have, weigh it in light of His precepts and principles, and then act. As we act, we can take comfort from the fact that He is at work within us, “both to will and to do for His good pleasure” (Phil. 2:13).
(Taken from: The NKJV Study Bible. Nashville, TN : Thomas Nelson, 2007)
Then the Lord said to him, “Peace be with you; do not fear, you shall not die.” So Gideon built an altar there to the Lord, and called it The-Lord-Is-Peace. To this day it is still in Ophrah of the Abiezrites.
For it is God who works in you to will and to act according to his good purpose.