~ I love you ~

The way I see it, this is your journal and your space. If you wish to use it to talk about your beliefs and/or to bounce them off of others, that's totally your freedom of choice. If you wish to give people the option, you can always use the journal cut option or make it obvious in the subject what you're going to write about. I myself won't lie and say I struggle with belief, faith, etc. So, reading other's thoughts wouldn't bother me one bit.