This series gives emphasis to the importance of the Bible in missions ministry in three of the keys to effectiveness. The first deals with basic Bible knowledge and the ability to know and find answers from the Bible. This one deals with applying the Bible to practical life, ministry, church, culture, and personal roles and issues on the field. The third will come soon, that is the priority to teaching the Bible as our primary sourcebook. The missionary needs to model and teach that the Bible is the highest authority to solve problems and conflicts as Christians, rather than tradition, cultural practices, external rules, social norms, popular trends, personalities, etc. Keeping the authority of Scripture will enable the indigenous church to grow strong and sustainable, even after the missionary leaves.