Good question havok20x. I'll give some of my two cents on it. I believe there is some biblical validity to that kind of sentiment because we are called to let our light shine in this world and we are not called to be monks. And we are called to be bold witnesses of Christ wherever we are placed, pro-actively sharing our faith with those around us as we have opportunity. Too many times we shrink back from sharing our faith and we keep quiet when we should speak up. I am guilty.
And we should have a healthy faith that believes God to do the miraculous with hardened hearts, knowing that He is more than able to save to the uttermost any person or group of people.
That said, we also need to be realistic as Scripture exhorts us. The Word also teaches us that we should expect persecution in this world from Christ's enemies. There is always going to be opposition to the gospel from this hostile world, and I don’t believe we should expect the whole world to be converted to Christ (I understand that Christians who hold to Postmillenialism believe that; I personally am of the Amillennial or Realized-millennium persuasion).
The Amillennial view says that there will always be a tension between the "already” and "not-yet” in the life of the believer, meaning the already realized spiritual, powerful kingdom of God which Christ has already inaugurated and brought into being with His first coming, and the not yet realized eternal kingdom of God that will be brought into being at Christ’s second coming. Already, as believers we can go forth confidently and boldly in preaching the gospel, trusting that God is mightily with us wherever we go. And at the same time we must understand that there will always be a real battle being waged here and we are always going to be in the thick of that battle as we abide in Christ.
A serious danger I see with kingdom now theology is that it can get you overly-focused on earthly prosperity as opposed to being heavenly-minded as Scripture commands us to be (Colossians 3:1-2).
Also, another concern is that while we are called to be in the world, we must be careful not to become of it. Too many times Christians think they need to be just like the world in many respects in order to reach the lost. And I believe too many times Christians take that to an extreme and lose the peculiarity that we are called to have and display.
