We should understand that when Adonai introduced the New covenant through the death burial and resurrection of Mashiach. He did it with the expectation that believers would be carriers and couriers of the Good news message in and through their current lives. Only let each person live the life the Lord has assigned him and live it in the condition he was in when G-d called him. This is the rule I lay down in all the congregation. (1Cor 7:17) This scripture does not prohibit improving your position in life but it does suggest that we are to be faithful and fruitful in the life that we are currently living. For the few who are called to full time ministry they are to do that, for those that find themselves in a particular vocation they should operate as faithful ministers of G-d within their sphere of life. That can be as a hospital worker, a stay at home mom, social work, a business owner and any other area that you might find yourself in. So people working in the medical field, moms raising kids and entrepreneurs contributing to society or whatever role you play is important and potentially world changing because you interact with people. The world gets to see your light which will turn there attention to G-d. The key is that you understand that you, right here and right now are called to make a difference in the world.