Do mental sinful activities cause a bad reaction?

Expressions researched:
"do mental sinful activities cause a bad reaction"

1972 Correspondence

We do not suffer for thinking something sinful. Not in this age. That is a special concession for Kali-yuga.

Letter to Madhudvisa -- Bombay 21 December, 1972:

Regarding you question, do mental sinful activities cause a bad reaction? The answer is no, they do not. We do not suffer for thinking something sinful. Not in this age. That is a special concession for Kali-yuga. Yes, you are correct in stating that spiritual activities, even mentally performed, are beneficial. You have seen the picture in NOD how a brahmana simply by mental service was promoted to Vaikuntha.