2 Kings 3:7
And he went and sent to Jehoshaphat the king of Judah, saying, The king of Moab hath rebelled against me: wilt thou go with me against Moab to battle? And he said, I will go up: I am as thou art, my people as thy people, and my horses as thy horses.
The chapter containing this call to go up against Moab presents a test of faith, picturing the testing, sifting, searching and temptation that all who put their trust in God and teach truth will meet in their work. Trust in that place must rest not in what people themselves can do but in what God can do for them and through them, for the work is not done by human strength. Trusting in what God can do brings the realization of His power.
The call to battle belongs to a setting where the battle against the enemy is turned not by human strength but by the strength of the mighty Commander of armies working for the glory of His own name. Those so tested must go forward with the grace of Christ despite apparent impossibilities obstructing the way, not questioning the length nor the obstacles of the way. God has ways and means for every emergency and works in ways least expected. The Holy One whose power is of old and whose ways are past finding out must not be limited by finite plans, and those who mark out in clear lines how He will work will be disappointed.