I think nowadays they can come from other people. Pretty much anyone/everyone (so maybe "society" is a good stand-in?) But, originally, perhaps when times were a lot different, the word of the Lord, whichever is your flavor, was more useful in keeping people on a more-fulfilling track. People with strong family ties likely didn't need to be as devout and so the church provided a good net for those alienated from society for many reasons. These days we're a lot more likely to have support and a lot less likely to be outcast (or at least not so severely) for being different.

I am also agnostic-raised-Catholic and this type of question is posed a lot. I don't struggle with it since I feel like I know the answer...BUT A) It's difficult to articulate, B) I can't really prove it, and C) it's also that I just know "the Bible" is very likely NOT the answer which just crosses one possibility off a list.