Final answer:
In Act III, scene iii, Hamlet refrains from killing King Claudius while he is in prayer, a decision that showcases his moral contemplation and procrastination, contributing to the development of his character.
Step-by-step explanation:
In Act III, scene iii of Hamlet, when Hamlet encounters King Claudius in prayer, he contemplates killing him but ultimately decides against it, reasoning that killing Claudius while he is praying would send his soul to heaven, which Hamlet sees as unjust revenge. This action reveals Hamlet's procrastination and moral deliberation, which are essential traits of his complex character. On the positive side, this scene shows Hamlet's deep moral thinking, as he does not want to commit an act of revenge without ensuring it is fitting punishment. Conversely, it highlights his indecisiveness and tendency to overthink, which further delay his action of avenging his father’s death. This scene is crucial in the development of Hamlet's character, illustrating his philosophical and contemplative nature but also his tragic flaw - his inability to take decisive action.