open and shut doors

"The problem with open doors is the emphasis is erroneously placed on the door rather than on God. Some people enter open doors under the mistaken assumption that God only allows good opportunities to come their way. Therefore, any good opportunity that comes along must be from God. Looking for open doors can appear easier than developing a relationship with God. Various opportunities, including questionable business opportunities and marriage proposals, can be treated as open doors. As you might imagine, this can often lead to disastrous results!

If decision-making were based entirely on open doors, people would not need a relationship with God; they could merely become "door watchers." Moses saw an open door to deliver a Hebrew being oppressed by an Egyptian. He went through it, and it cost him forty years wandering in the wilderness (Exod. 2:11-15). King Saul seized an opportunity to offer an unauthorized sacrifice to God, and it cost him his kingdom (1 Sam. 13:8-9). King David stumbled through an open door to an improper relationship with Bathsheba, and his house was filled with violence and heartache for the rest of his life (2 Sam. 11). Conversely, David twice had the opportunity to murder King Saul. Doing so would have removed his greatest enemy and opened the door for his rightful place as king. Yet both times David wisely recognized the opportunity before him was not from God (1 Sam. 24, 26). Simply entering an open door without checking to see if God opened it can bring catastrophic consequences."

-- from Henry Blackaby's "Hearing God's Voice"