Final answer:
In the poem 'Invictus,' the speaker discusses how a person can overcome adversity through the power of the human mind and spirit.
Step-by-step explanation:
In the poem 'Invictus' by William Ernest Henley, the speaker explores how to overcome adversity. The speaker emphasizes the power of the human mind and spirit in conquering challenges. For example, in the lines 'It matters not how strait the gate, / How charged with punishments the scroll,' the speaker implies that no matter how difficult the circumstances, one can still overcome adversity. This theme of inner strength is further supported by other literature and art that explores the human capacity to triumph over hardships.