Who said "Virtue is its own reward"?

This quote is attributed to Dunya.

Virtue is its own reward - Dunya

"Virtue is its own reward"

Dunya

Character in Crime and Punishment

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"The more one loves genuinely, the more one despairs."

"The poor deserve compassion, not judgment"

"The heart rules, not the head."

"The mind is willing but the flesh is weak."