“But truly, as I live, and as all the earth shall be filled with the glory of the Lord,” – Numbers 14:21
Too many missionaries move forward with trepidation because they view God’s Great Commission as too large, and their own abilities as too small. Certainly, if we attempt to bear the burden of missions on our own shoulders it is an unmanageable, confidence crushing, anxiety producing mess.
The sovereignty of God should produce confidence in missionaries as they acknowledge it is not their labors which matter, but God’s. In addition, God has already promised that he will have victory. Johnathan Edwards said, “God hath sworn by his great name, that he will have his glory of men, whether they will actively glorify him or no.” The pressure is off us. God bears the load by working through us and he has already assured victory.
This guarantee should give every missionary the liberty they need to fail. If God is both the laborer and the victor, the stress is not ours. God’s declaration of the certainty that the entire earth will glorify the Lord is freeing to the missionary. The laborers in the harvest are to simply avail themselves to God’s calling. Following God’s will in obedience provides the missionary with the understanding that their insufficiency is dwarfed by the sufficiency of the Creator of the universe.
The missionary who falsely takes the responsibility of the souls of the nations on himself is doomed to fail under a task which he cannot accomplish. God’s authority and his guarantee removes the stifling fetters from the ankles of God’s servants. A missionary is liberated from unrealistic expectations by God’s assurance of triumph through his will. How frightening and depressing it must be for a missionary to live under a false belief that their actions, or inactions, can cost a saint his eternity. Bask in the already determined outcome of God’s ordained plan for the nations. Labor with joy, not with a crippling fear of a failure which will never be realized.
 Jonathan Edwards, The Works of Jonathan Edwards, vol. 2 (Banner of Truth Trust, 1974), 129.