When she was a teenager, Barbara Ehrenreich (Nickel and Dimed) started journaling, as many of us do. After penning the usual things (what was happening in her life, thoughts about books she was reading), she realized there was a purpose for the journal.

It was a tool. As she wrote in Granta:

I had discovered that writing – with whatever instrument – was a powerful aid to thinking, and thinking was what I now resolved to do. You can think without writing, of course, as most people do and have done throughout history, but if you can condense today’s thought into a few symbols preserved on a surface of some kind – paper or silicon – you don’t have to rethink it tomorrow … The reason I eventually became a writer is that writing makes thinking easier…

Sometimes you have to write your way through something to understand it. You may even have to start writing without knowing your destination. Writing orders your thoughts, whatever they are.