Since last week's post was on believe or belief , I decided to ask whether it's believe in , believe on or believe that . All of these are correct and do get used. The questions are when, where, why and how. Here it is in what I hope is the simplest way to explain it and the easiest way to remember it. Believe In and Believe That Correlation A certain professor, H. H. Price , came to the conclusion that there is a difference between believe in and believe that . To him, it came down to this, “Surely belief-in is an attitude to a person, whether human or divine, while belief-that is just an attitude to a proposition?” This makes perfect sense considering the words in and that . Personally, in sounds a lot more involved and personal, whereas that seems distant. Get that away from me. Come on in . That might just be me though. However, this view might make things easier. What if this thinking was indeed the correct manner? To believe in someone is intimate. If you