Usually the Character is finding himself in a crisis or finding the solution to that conflict. Like a Hero defeating a villain or a evil element. The climax is usually characterized by high tension and drama. It is the highest spot in the plot. Hope this helps.
The line from Hamlet that best describes that Hamlet is not happy is the one where he regrets not being able to suicide because it is a sin:
<em>"Oh, that this too, too sullied flesh would melt,</em>
<em>Thaw, and resolve itself into a dew,</em>
<em>Or</em><u><em> that the Everlasting had not fixed</em></u>
<u><em>His canon 'gainst self-slaughter!</em></u><em> O God, God!</em>
<u><em>How weary, stale, flat, and unprofitable</em></u>
<u><em>Seem to me all the uses of this world!"</em></u>
He is so depressed that he wants to commit suicide for this world is so horrible for him, that finds it weary, stale, flat and unprofitable.
a. a discussion of specific uses of repetition