It is often said that Jesus "raised the bar" when he said "every time you lay eyes on a woman to lust after her" or similar.
But really, this is totally false. Divorce and murder are rules regarding behaviour. Of course, in a society you have to set up such rules so that everyone knows what is and isn't allowed. What takes place inside you is not "more" nor "less" than that - it is just something completely different.
If your inner behaviour helps you conform to a desired outer behaviour - more power to you. But really, this is your own decision and not something that a godbeing/son of god/magic man in the sky can decide and decree for you.