Hallucination

Thomas Edison once said "vision without execution is hallucination." That hit me like a ton of bricks. Julie and I have had dreams of doing some very specific things for God from the time we were teens. We have seen many of them already. But that's not the end. God has put dreams in our heart that he wants us to "execute." Of course in our execution, we must be dependant upon Him, but what if we fail? Edison says we are hallucinating. Don't get me wrong, we will fail at some things, but not at the vision God has placed inside of us. I am a believer that if God gives you the vision, he expects you to fulfill it. Please don't hear what I am not saying, but I wonder how many leaders, pastors, etc are just hallucinating. Do we really have a vision from God or are we making up something in our own minds? We have to get on our face and know what it is he expects from us and not just attempt to do what the next guy has done. What are your thoughts?