I have been driven, many times, to my knees by the overwhelming conviction that I had no where else to go.
The trick, as a Christian, is not to be 'driven to your knees' only by not having any where else to go, but to be driven to our knees dozens of times a day. Not that we have to physically take a position on our knees, but that our hearts and focus would be so strong that, whenever faced with a choice, we automatically look up to our Father and seek His counsel.
Now if I could only do that, instead of just writing it, I'd be in good shape. Lord, help thou my unbelief!