You add up the advantages and disadvantages, count the costs, and make a tough decision. Jesus says over and over in the scripture that this kind of thinking is necessary for the spiritual life as well as for the life of business. He chides his disciples for not using this kind of thinking in their spiritual life. He sees that the rich young man is choking to death in his privilege and wealth, that he is unable to find any meaning in his life so long as everything is so perfect and he is so insulated, so he recommends to him the course of giving his wealth to the poor and joining the adventure with Jesus and his disciples. He says the same to you and me.
Life is short.
The way to destruction is easy. The gate to real life is narrow. Enter in the narrow gate. The real problem, however, is that there is a life to be lived after dramatic, business-like decisions are made, and there are portions of life that do not answer to that kind of precipitous decision making. If you can fix your spiritual life by cutting off your hand or your foot, or by plucking out your eye, by all means do so.