A missions commitment is similar to someone who wants to be a pastor or church elder (as in 1 Tim. 3) or to becoming a teacher or local church leader – pastor-teacher-elder. It starts with a desire and grows into a conviction and commitment and is confirmed by the external verification of that call by a local church ordaining them to start a church in a new area or by a local church calling them to become their pastor.
1 Timothy 3:1 says, “If any man aspires to the office of an overseer, it is a fine work that he desires to do.” A missionary/ evangelist also starts with an internal desire and conviction the same way the pastoral ministry does.
There is a godly ambition to preach the gospel not where Christ is named. (Romans 15:20-21)
Paul said, “Woe is me if I do not preach the gospel” – I Cor. 9:16 Usually, someone who is really “called” by God to be a missionary, will have such a strong conviction and commitment to going that they will do all they can to get there – they will seek the Lord, seek to live holy so as to not become disqualified (1 Cor. 9:27) and be submissive to their local church leaders along the way and persevere in the time it takes to actually get to the mission field.