The poem opens amidst total, suffocating darkness:
'Out of the night that covers me, / Black as the pit from pole to pole, / I thank whatever gods may be / For my unconquerable soul.'
The 'night' symbolizes severe pain, disease, loneliness, and despair stretching across his entire world. Yet, rather than despairing, the speaker expresses gratitude for his indomitable spirit, which no suffering can crush.