"If there be a very great alteration visible in a person for a while, if it be not abiding, but he afterwards returns, in a stated manner, to be much as he used to be; it appears to be no change of nature, for nature is an abiding thing. A swine that is of filthy nature may be washed, but the swinish nature remains; and a dove that is of a cleanly nature may be defiled, but its cleanly nature remains."
Jonathan Edwards. "The Religious Affections." Dover Publications, Inc: Mineola, New York. (1746) 2013. p.268.
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