Doubt

Faith without doubt is not faith; it is ignorance. Faith is belief in the sight of doubt, the determination to follow truth because it is truth. When a child of four years old excepts Christ at their Savior, she has no idea what that means. She will spend the rest of her life figuring out what that decision meant, whether she meant it, if should even knew what she was saying. She will doubt. But, she will have to use faith, hold with white knuckles to the truth that all those that confess and repent are forgiven. She will "work through her faith," discover the mysteries of God and His Word to fully formulate this faith that she has taken hold of. Satan will use her readiness to receive the Gospel against her, but she will fight against the doubt and come out victorious, with a faith stronger because of it.

18 Against all hope, Abraham in hope believed and so became the father of many nations, just as it had been said to him, “So shall your offspring be.”[d] 19 Without weakening in his faith, he faced the fact that his body was as good as dead—since he was about a hundred years old—and that Sarah’s womb was also dead. 20 Yet he did not waver through unbelief regarding the promise of God, but was strengthenedin his faith and gave glory to God,