The LORD's anger burned against Uzzah, and he struck him down because he had put his hand on the ark. So he died there before God (1 Chronicles 13:10).
A life of faith often requires us to leave God's work alone. Responding to a need out of a desire to help move a vision along can be the greatest challenge for a Christian entrepreneur. There is a fine line between presumption and faith.
Uzzah learned that presumption could cost you your life. He was part of the crew that was to move the ark with the help of a team of oxen. When the way became rough, Uzzah responded in a natural way. He grabbed the ark to steady it. When he did he was immediately struck down. God said it was forbidden to touch the ark. King David mourned the death of his servant and argued with God about this loss.
Walking with God in the marketplace requires sensitivity to balancing our God-given talents and operating in the power of the Holy Spirit in and through our business life. A mentor once told me, "You almost have to hold back your natural gifting to ensure that God is the one who is guiding you. If not, you will not know if it is through your skill versus His hand that you are accomplishing the work." I find this the most challenging aspect of a walk with God in the marketplace.
You can only grow in your understanding of this balance by being accountable to others in the process. By having other committed Christians walking close to you, they become the safety net to keep you from presumption and the deceit of the heart. God also placed Godly spouses there to help us in this area.