Missiology - what is that? If you have an interest in missions, leadership of missions, or are going into missions, you must know some basic principles of missiology. Sound, biblical principles and practice of missiology will be the lens for your understanding and evaluation of missions ministry. The first one is the first priority: the missionary must make culture and language learning their first priority on the field. It is the foundation upon which all other ministry is built. It is a process that is intense at first and never really ends. It is comprehensive in its impact on their life and work on the field. Don't short circuit a requirement and the time required for high proficiency in the language.