Example when On means one

Bonjour Farz,

Have a look at the following link:-

On can mean either we/one/people (French Subject Pronouns)

"Here on includes people in general, or can be a theoretical statement such as one [does that]."

I hope this helps

Bonne continuation

Jim

"One always looks both ways before crossing the road" Its like if you were talking in proverbs or something. 

Hope this helps!