Definition of «to know the reason»

"To know the reason" means understanding or having knowledge about the cause or explanation behind something.

Perhaps he felt that if people do not know the reasons for prayer, there is no use telling them. (religion-online.org)
I really don't know the reason why people read my blog but I am very thankful for that. (filipinobloggersworldwide.com)
There are a number of well known reasons for that. (justarsenal.com)
(see all sentences)