The Red Badge of Courage
Previously he had never felt obliged to wrestle too seriously with this question. In his life he had taken certain things for granted, never challenging his belief in ultimate success, and bothering little about means and roads. But here he was confronted with a thing of moment. It had suddenly appeared to him that perhaps in a battle he might run. He was forced to admit that as far as war was concerned he knew nothing of himself (1.43).
He felt that in this crisis his laws of life were useless. Whatever he had learned of himself was here of no avail. He was an unknown quantity. He saw that he would again be obliged to experiment as he had in early youth. He must accumulate information of himself, and meanwhile he resolved to remain close upon his guard lest those qualities of which he knew nothing should everlastingly disgrace him. "Good Lord!" he repeated in dismay (1.47).
For days he made ceaseless calculations, but they were all wondrously unsatisfactory. He found that he could establish nothing. He finally concluded that the only way to prove himself was to go into the blaze, and then figuratively to watch his legs to discover their merits and faults. He reluctantly admitted that he could not sit still and with a mental slate and pencil derive an answer. To gain it, he must have blaze, blood, and danger, even as a chemist requires this, that, and the other. So he fretted for an opportunity (2.3).