Mongoose query, wrapped in a function, always returns 'undefined' [duplicate]

This question already has an answer here:

• How do I return the response from an asynchronous call? 17 answers

I am sure somebody has asked this question before, but I can't find an answer that helps me. I'm running a node app that queries a MongoDB database using the Mongoose package, and the model is called Quote. Direct querying of the DB works fine (i.e. there is no connection problem), but putting a query inside a function, so it can be run elsewhere, is not working. The following function is supposed to grab one record from the database, and then return it.

var getQuote = function(id) {
  Quote.find({ quote_id : id }, function(err, quote) {
    if (err) {
      return console.error(err);
    }
    else {
      return quote;
    }
  });
}

The following prints out undefined

console.log(getQuote(10));

I know it has to do with the fact that the database hasn't returned the result of the query yet - it's running asynchronously. So, how do I get that result? A lot of answers say "just throw in a callback!!" OK, how do I throw in a callback? callback() is not a defined function! (sarcasm) Thank you in advance for humoring my ignorance!

via Peter Martinson