The Great Commission can be accomplished as millions of Christians develop a personal strategy that ties in directly to Christ's global strategy. One Christian with a personal strategy, focusing all his efforts, can magnify and multiply his fruitfulness beyond measure. A personal strategy is a deliberate plan of action by an individual to accomplish a specific goal. Since the goal of every sincere believer should be to help fulfill the Great Commission, his personal plan should include evangelizing and discipling, adding and multiplying.
Size is approx.
When you personally introduce another to Christ, that is spiritual addition. Let me illustrate. During a Campus Crusade for Christ banquet in Manila, the director of our Great Commission Training Center introduced a medical doctor whom he had introduced to Christ and discipled. The doctor stood and gave his testimony, then introduced one of the persons whom he had introduced to Christ and discipled. This man in turn gave his testimony and introduced one of the medical students whom he had introduced to Christ and discipled.