[God] may direct some to leave their homeland to go to proclaim the Gospel in a foreign land. There is a great temptation in such circumstances for people to revert to the legalism of thinking that they are being heroes for God because they are leaving their homeland to endure the rigors of living in a foreign land. Those who are directed to do hard jobs for God must remind themselves that these rigors are simply for their health. As these difficulties help them become more like Christ, they will sing a song of praise unto God, and as a result 'many will see it and fear and put their trust in the Lord' (Psm. 40:3). People who regard themselves as invalids rather than heroes will make excellent missionaries.