Does Sin Really Affect One's Mental Health?

It appears to be the case, as we can see in this Washington Blade article.

Blessed bigotry: Pope Benedict XVI is Anti-Gay Person of the Year
‘God’s rottweiler’ actively pursues political agenda against gay marriage, priests
By DYANA BAGBY

EDITORS’ NOTE:
As 2005 draws to a close, many media outlets will announce their selections for person of the year. In past years, Blade editors have selected a Story of the Year instead.

This year, the Story of the Year was, in our view, the extraordinary efforts of one individual to not only put a halt to the acceptance of gay people legally and within the mainstream culture, but to roll back such acceptance to an earlier, less tolerant and more discriminatory time.

Presiding over what some describe as the "strongest bully pulpit in the world," Pope Benedict XVI, just eight months into his tenure, has unilaterally targeted gays as moral threats to society.

More evidence of sin's effect on mental health here.