And shall not doubt in his heart.
But let him ask in faith, nothing wavering.
It is a powerful phrase, and the word shows up elsewhere (Mt. 21:21; Rom. 4:20; 14:23). A. T. Robertson says, “It is a vivid picture of internal doubt.”
We must not only believe God, we must believe we believe God. Like the silly habit of going back to see whether you really did lock that door, an unsettled state of spiritual indecision is developed by doubting souls. They never “close the gate” behind them, they are forever reconsidering their decisions. They are never sure of their conversion or their consecration. They are ever learning and never able to come to a knowledge of the truth.
When you have made any covenant with the Lord consider it final. If you did it honestly in the light you had you insult Him and your own intelligence by going over it all again. It becomes a vicious habit, and you can never be sure of anything. You never stand firmly on any point for fear you may be wrong.
Close your gates behind you and move on, “nothing doubting,” “for he that wavereth is like a wave of the sea driven with the wind and tossed.”