HP 197.3
(In Heavenly Places 197.3)
Polluted thoughts harbored become habit, and the soul is scarred and defiled. Once do a wrong action and a blot is made which nothing can heal but the blood of Christ; and if the habit is not turned from with firm determination, the soul is corrupted and the streams flowing from this defiling fountain corrupt others.—Letter 26d, 1887. (HP 197.3) MC VC