Which expression is more commonly heard in the US?

My perception is that "seeing is believing" is more common.

But, anyhow, you've heard of "to see is to believe"?...because i'm starting to think it's another Filipino English terminology. When i googled "to see is to believe" i got redirected to a lot of Filipino websites.
I know infinitives, just like gerunds, could also function as nouns. so there's nothing grammatically erroneous about "to see is to believe". I was just worried that it may be anoth

Yes, "to see is to believe" is a genuine English-language expression, not a mangled version.

lagatawthere's nothing grammatically erroneous about "to see is to believe".

No. The grammar is fine. It seems to me, however, just as a matter of what is idiomatic, that the gerund is much more used than the infinitive as a subject of a sentence. Like Mr Wordy, I am much more familiar with "Seeing is believing".

CJ

Sorry, I have only just noticed that your subject line asks: "Which expression is more commonly heard in the US?" I am from the UK. If I'd noticed before I wouldn't have answered but would have left it to the AmE speakers.

If no AmE speakers pop up in this thread then you may wish to re-post the question, but, if you do, might I suggest that you put put all the information releva

I didn't see the "in the US" either, but I doubt there's any difference between BrE and AmE with regard to this preference.

CJ

CJ and I are American speakers, and I agree with both CJ and Mr. W - the gerund is far more common.

Thank you very much guys!