Final answer:
Hamlet wishes he could die to end his pain in the soliloquy that begins with "O, that this too too solid flesh would melt," expressing his deep sorrow and desire to escape his torment.
Step-by-step explanation:
The line from Hamlet that shows us he wishes he could die to end his pain is from his famous soliloquy that begins with "O, that this too too solid flesh would melt". In Act I, Scene II, Hamlet expresses his deep sorrow and wishes that his physical body would dissolve into dew to escape his torment over his father's death and his mother's hasty remarriage. This illustrates the depth of Hamlet's depression, his profound grief, and the intense dislike of his current circumstances, which are too burdensome for him to bear.