They were irrelevant even 30 years ago. Unfortunately their impact isn't.

They were from the leader of one of the largest religions of the world–which still represents roughly 17% of the world population. I'd say they are still relevant and part of what Numberwang refers to as a "modern view of the world".

BTW, I'm not saying I agree with the content of those lectures. Only that dismissing them because you think the modern world doesn't hold those views is silly. And, yes, I'm aware that more recent pontiffs have expressed different views.

just to know what are this different views by more recent pontiffs.

I'm aware that some people think they're relevant (and that fact is relevant), I'm just pointing out that the teachings themselves are not.

You seem to be confusing "relevant" with "correct".

The teachings are most definitely relevant, if for no other reason than that perhaps a billion people worldwide consider the teacher to be directly important to them.

Being outdated is about content, not publication date.