How does Henry's mental status and well-being change over the course of The Red Badge of Courage?

The protagonist of Stephen Crane's The Red Badge
of Courage, Henry Fleming undergoes many of the emotional trials that many
young men suffer during extreme pressure. At the beginning of the novel, he displays an
anxious nervousness of how he will respond to his first combat. Fear overtakes him as
his unit prepares for the first attack, but after his regiment initially turns back the
enemy, he feels relief. It is only short-lived, however, and during the second
Confederate charge, his fear returns in the most awful way. His guilt after
"skedaddling" overwhelms him, and he spends the day trying to come to terms with his
cowardly actions. After his crime is covered up by his story that he has been wounded,
he again feels a profound relief and determines to make up for his deceit. During the
next day's action, impulsive recklessness causes him to move into the open, daring the
enemy to deliver a true "little red badge" that will redeem him in his own eyes. His
actions are considered inspired heroism by the rest of his unit, and it prompts the
others to bravery that many of them did not know could be summoned. After the battle, he
again feels guilt at his perceived bravery, and when he confesses to his friend, he
absolves himself of the false bravado (and the previous lack of courage) of which he had
little control. As he moves out to the next skirmish, he is light-hearted, for he has
"passed the supreme test," and the unknown emotional trials of before have been
answered.