For one reason or another, everyone will at times have thoughts that spiral downwards. Against this stands faith, but what if the thoughts that fall are those intricitally linked to our individual formation of faith? Then love. Love from the heart. Love the things that inspire us* and let this love instruct your faith; move hopefully away.
* The world is full of good signs. Those that instil a sense of worship are probably the ones that most easily lead us out of the prisons we build.